tree.json

{
  "mysql": {
    "node_id": "mysql-5a1177c8ea254278855ed36089ddecd5",
    "keywords": [],
    "children": [
      {
        "MySQL初阶": {
          "node_id": "mysql-a2097b15da334afeb39804bc57342da9",
          "keywords": [],
          "children": [
            {
              "关系型数据库": {
                "node_id": "mysql-67b5ccfe50d34cf99c38d0e63f95c59e",
                "keywords": [
                  "关系型数据库",
                  "database",
                  "relational",
                  "rdbms"
                ],
                "children": [
                  {
                    "10 分钟了解 MySQL": {
                      "node_id": "mysql-925f9d57c7794e5391fb790bcdbf43c6",
                      "keywords": [
                        "MySQL",
                        "入门"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "概念"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "数据库基本概念": {
                      "node_id": "mysql-8e971f3c569a4e56bb83b5d75a2a425f",
                      "keywords": [
                        "MySQL",
                        "关系型数据库"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "数据库",
                          "概念"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "安装和登录": {
                "node_id": "mysql-c6fb4b9d5c13492289fd14d06911c1e5",
                "keywords": [],
                "children": [
                  {
                    "安装": {
                      "node_id": "mysql-95d0b7e5493e478f85ca49a77a13d194",
                      "keywords": [
                        "安装",
                        "MySQL"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "安装"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "登录": {
                      "node_id": "mysql-932a42b96ee34177b3d980c30cbab717",
                      "keywords": [
                        "登录",
                        "身份验证",
                        "授权"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "登录"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "使用数据库": {
                "node_id": "mysql-ffe7d96945264633aa3ba54acd22b3a9",
                "keywords": [],
                "children": [
                  {
                    " 创建和删除数据库": {
                      "node_id": "mysql-764d5080ddb943fe9236922984afa152",
                      "keywords": [
                        "create database",
                        "drop database",
                        "创建数据库",
                        "删除数据库"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "数据库",
                          "创建"
                        ],
                        [
                          "mysql",
                          "数据库",
                          "删除"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "创建和删除表": {
                      "node_id": "mysql-426b0b1e04a4462e984ee77ca536f916",
                      "keywords": [],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "创建",
                          "表"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "数据库编码": {
                      "node_id": "mysql-401a4084d56c4123afa3ced3aa0e5e98",
                      "keywords": [
                        "数据库",
                        "encode",
                        "characterset"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "编码"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "存储引擎": {
                      "node_id": "mysql-cd45ce715f914ef2895df639a5d206a3",
                      "keywords": [
                        "engine",
                        "存储引擎"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "存储引擎"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "数据类型": {
                "node_id": "mysql-ce5531c7c7934e2d9be844133f103fee",
                "keywords": [],
                "children": [
                  {
                    "数值类型": {
                      "node_id": "mysql-1418d1a710ab4e7c8cacb0bad047179e",
                      "keywords": [
                        "数值",
                        "int",
                        "long",
                        "float",
                        "double",
                        "decimal"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "数值类型"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "日期和时间类型": {
                      "node_id": "mysql-7256fe88bcf241d486c9e2e254ef66d9",
                      "keywords": [
                        "date",
                        "time",
                        "timestamp"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "日期类型"
                        ],
                        [
                          "mysql",
                          "时间类型"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "文本字符串类型": {
                      "node_id": "mysql-27ff66e31d3d4118977cbbc04da6887e",
                      "keywords": [
                        "text",
                        "varchar",
                        "char",
                        "字符串",
                        "文本"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "文本",
                          "字符串"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "二进制字符串类型": {
                      "node_id": "mysql-ec8f22f2c63a4f27bd12815644d0f3db",
                      "keywords": [
                        "binary",
                        "blob",
                        "二进制"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "二进制",
                          "字符串"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "数据修改": {
                "node_id": "mysql-8ee645083a5b4062b2c09b2a14a06f67",
                "keywords": [],
                "children": [
                  {
                    "插入": {
                      "node_id": "mysql-fcca525ab0f04f16834ded9b2b3f38a4",
                      "keywords": [
                        "insert",
                        "插入"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "插入"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "修改": {
                      "node_id": "mysql-2eb9e9d351e848f580b70cf9e7b93280",
                      "keywords": [
                        "update"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "修改"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "删除": {
                      "node_id": "mysql-3cae643e21644d6d937d69b59014922f",
                      "keywords": [
                        "delete"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "删除"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "数据查询": {
                "node_id": "mysql-aabf6529eaa04d94b627de1a5f2fea23",
                "keywords": [],
                "children": [
                  {
                    "SELECT": {
                      "node_id": "mysql-f5527eae7f3148108c92ff99a6d4ed4a",
                      "keywords": [
                        "查询",
                        "select"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "select"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "WHERE": {
                      "node_id": "mysql-91cc9c73e58945d3ba654370a057a1c7",
                      "keywords": [
                        "查询",
                        "select",
                        "where"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "where"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "运算符": {
                      "node_id": "mysql-8f2aac71ea494f1b84372d43aa436135",
                      "keywords": [
                        "operator",
                        "运算符"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "运算符"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "函数": {
                      "node_id": "mysql-07b85d4c87c84a62a9b55299250cd9a3",
                      "keywords": [
                        "function",
                        "procedure",
                        "函数",
                        "存储过程"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "函数"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            }
          ],
          "keywords_must": [],
          "keywords_forbid": [],
          "group": 0
        }
      },
      {
        "MySQL中阶": {
          "node_id": "mysql-4ccd6a9874f147bc9e5f368e3bd90850",
          "keywords": [],
          "children": [
            {
              "数据库组成": {
                "node_id": "mysql-eb03e9500ad143148847cd5130da4787",
                "keywords": [],
                "children": [
                  {
                    "表": {
                      "node_id": "mysql-0f0cd6ec82e343db95ed800a7d964cfc",
                      "keywords": [
                        "表",
                        "table",
                        "自增字段",
                        "auto_increment"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "表"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "视图": {
                      "node_id": "mysql-98e926730d844f238dc9cd8ac5f65126",
                      "keywords": [
                        "view",
                        "视图"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "视图"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "存储过程和函数": {
                      "node_id": "mysql-38fbee06f03c4265903345cae13996c1",
                      "keywords": [
                        "produce",
                        "function",
                        "函数",
                        "存储过程"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [
                        [
                          "mysql",
                          "存储过程",
                          "函数"
                        ]
                      ],
                      "group": 2
                    }
                  },
                  {
                    "索引和约束": {
                      "node_id": "mysql-8bd217c396eb4f44b76cdb04c5d4674d",
                      "keywords": [
                        "索引",
                        " 约束",
                        "constraints",
                        "index"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "索引",
                          "约束"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " 触发器": {
                      "node_id": "mysql-d1d26b008711441f82192c33e1fe4dd7",
                      "keywords": [
                        "trigger",
                        "触发器"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "触发器"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "存储引擎": {
                      "node_id": "mysql-af89d54d66974111b4f67aeba2af7161",
                      "keywords": [
                        "engine",
                        "innodb",
                        "myisam"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "存储引擎"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "查询进阶": {
                "node_id": "mysql-ed0a3aa2ca704780ae72749842657fa7",
                "keywords": [],
                "children": [
                  {
                    " 别名": {
                      "node_id": "mysql-1d350c6226d443bdb76b5058d8ee23e7",
                      "keywords": [
                        "aliases",
                        "别名"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "别名"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " BETWEEN": {
                      "node_id": "mysql-2296dbe96d584a52bd28a3ad5f655518",
                      "keywords": [
                        "where"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "between"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "CASE": {
                      "node_id": "mysql-8e6cd4d5f4b446a2bc3f5402de9bd49c",
                      "keywords": [
                        "when",
                        "case",
                        "pivot",
                        "透视表"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "case"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "DISTINCT": {
                      "node_id": "mysql-153ce0dadc824af98de199f193c8c75c",
                      "keywords": [
                        "distinct"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "distinct"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "ORDER BY": {
                      "node_id": "mysql-fa20a81805b44975aed265dd058c542a",
                      "keywords": [
                        "order by",
                        "排序"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "order by"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "UNION": {
                      "node_id": "mysql-b57b6c08f5f240c6a997284e4448f088",
                      "keywords": [
                        "union"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "union"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "正则表达式": {
                      "node_id": "mysql-e6cbbff27cd04bc0b61ebbb3ef27d4b2",
                      "keywords": [
                        "regex",
                        "regular"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "正则表达式"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    " 分页查询": {
                      "node_id": "mysql-da7b258f8b0b4597924737902a5018d3",
                      "keywords": [
                        "分页",
                        "limit",
                        "offset"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "分页"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "内置函数": {
                "node_id": "mysql-f436539236694bb9a4014de11e06ad82",
                "keywords": [],
                "children": [
                  {
                    "锁相关": {
                      "node_id": "mysql-e5c47aa105c5484c8871825dd622cc5e",
                      "keywords": [
                        "函数",
                        "锁",
                        "lock"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "JSON函数": {
                      "node_id": "mysql-2adc9f3d02b54abc893f288140109118",
                      "keywords": [
                        "json"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "窗口函数": {
                      "node_id": "mysql-5ccb985581644784ae82118849bc241c",
                      "keywords": [
                        "window function",
                        "窗口函数"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "时间日期函数": {
                      "node_id": "mysql-a7006c27131d4b87817a59717db7021c",
                      "keywords": [
                        "datetime",
                        "timestame",
                        "date",
                        "time",
                        "year",
                        "month",
                        "day",
                        "hour",
                        "minute",
                        "second",
                        "microsecond"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "其它函数": {
                      "node_id": "mysql-df29b082d5364530b95bbdc14adc107e",
                      "keywords": [
                        "函数",
                        "cast",
                        "convert"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "聚合和分组": {
                "node_id": "mysql-06b0b1a126e3440ab67e5ab103ef9e92",
                "keywords": [
                  "group by",
                  "分组"
                ],
                "children": [
                  {
                    " 计数": {
                      "node_id": "mysql-ac3c072bc54749bdb82324f2b203890d",
                      "keywords": [
                        "count",
                        "计数"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "计数"
                        ],
                        [
                          "mysql",
                          "count"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " 求和": {
                      "node_id": "mysql-c5654c150993418a96f692496837fbb7",
                      "keywords": [
                        "sum",
                        "求和"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "求和"
                        ],
                        [
                          "mysql",
                          "sum"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "最小值": {
                      "node_id": "mysql-c1652108441c424197c0c3c526e4831c",
                      "keywords": [
                        "min",
                        "最小值"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "最小值"
                        ],
                        [
                          "mysql",
                          "min"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " 最大值": {
                      "node_id": "mysql-77042376726743bea5c97e82a67a2016",
                      "keywords": [
                        "max",
                        "最大值"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "最大值"
                        ],
                        [
                          "mysql",
                          "max"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " 平均值": {
                      "node_id": "mysql-11462fccf9d24d17a372d5c60af90f54",
                      "keywords": [
                        "avg",
                        "平均值"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "HAVING": {
                      "node_id": "mysql-3b85e53dd88146798d21b7254ad85cae",
                      "keywords": [],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "having"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "子查询": {
                "node_id": "mysql-787937c95738421ba7b1d5b8aafe55d0",
                "keywords": [
                  "子查询",
                  "subquery"
                ],
                "children": [
                  {
                    "相关子查询": {
                      "node_id": "mysql-f045eeff32bd449c83afc76abdd65344",
                      "keywords": [
                        "相关子查询",
                        "correlated subquery"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "相关子查询"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " ANY": {
                      "node_id": "mysql-6bb279fa10fa4633a3af51ff7001f5ce",
                      "keywords": [
                        "subquery",
                        "子查询",
                        "any"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "any"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "ALL": {
                      "node_id": "mysql-87c2d9bc921643aabfd1b12b964ef557",
                      "keywords": [
                        "子查询",
                        "subquery",
                        "all"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "all"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "EXISTS": {
                      "node_id": "mysql-6c6789b86f714acaa76467fdf9623191",
                      "keywords": [
                        "exists"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "exists"
                        ]
                      ],
                      "keywords_forbid": [
                        "not exists"
                      ],
                      "group": 1
                    }
                  },
                  {
                    " IN": {
                      "node_id": "mysql-8436069c855c4f1ead7cf11a026e004b",
                      "keywords": [
                        "in",
                        "subquery",
                        "子查询"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "in"
                        ]
                      ],
                      "keywords_forbid": [
                        "not in"
                      ],
                      "group": 1
                    }
                  },
                  {
                    " 列子查询": {
                      "node_id": "mysql-7bc092b1b1854dd3b88eed3a517b96a2",
                      "keywords": [
                        "子查询",
                        "列子查询"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "列子查询"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [
                  "子查询",
                  "subquery"
                ],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "连接查询": {
                "node_id": "mysql-e12eca4c9358429f9222a3f32e1798f6",
                "keywords": [
                  "join",
                  "连接查询"
                ],
                "children": [
                  {
                    "INNER JOIN": {
                      "node_id": "mysql-73bfbd883511436c85130b71fa108038",
                      "keywords": [
                        "inner",
                        "join",
                        "连接查询"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "inner join"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " LEFT JOIN": {
                      "node_id": "mysql-d7a8869fb798498c839c913ce930015d",
                      "keywords": [
                        "左连接",
                        "left join"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "left join"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " RIGHT JOIN": {
                      "node_id": "mysql-7c2331eea3e84eef9464ad4d7c03e2de",
                      "keywords": [
                        "right join",
                        "右连接"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "right join"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " CROSS JOIN": {
                      "node_id": "mysql-fd27af20b046463eac7b2712885ac018",
                      "keywords": [
                        "cross join",
                        "交叉连接"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "cross join"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    " 复杂连接": {
                      "node_id": "mysql-a4773004e0cf432aa7ccdf6b9490838f",
                      "keywords": [
                        "join"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "复杂连接"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [
                  "join",
                  "连接查询"
                ],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              " 索引": {
                "node_id": "mysql-6ac51e7a042849f6a5f9c52a1cd1e347",
                "keywords": [],
                "children": [
                  {
                    "索引入门": {
                      "node_id": "mysql-bf629829370d405cbfcd5aa83adb536a",
                      "keywords": [
                        "index",
                        "index"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "索引",
                          "入门"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "创建索引": {
                      "node_id": "mysql-fe65d5c615ad40f8ac056cc654f2d788",
                      "keywords": [
                        "create index",
                        "创建索引"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "创建",
                          "索引"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "删除索引": {
                      "node_id": "mysql-85ba0df78d754b00b30aa8e74ad35d06",
                      "keywords": [
                        "删除索引",
                        "drop index"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "删除",
                          "索引"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "进阶任务": {
                "node_id": "mysql-4b1a9d9a0e484f3aa5516f56ebe0a277",
                "keywords": [],
                "children": [
                  {
                    "MySQL问答": {
                      "node_id": "mysql-936c558ee432463da847bd04f7c5f9b9",
                      "keywords": [],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 1
              }
            },
            {
              "MySQL 日志": {
                "node_id": "mysql-d5ebce6873374cc09621311f5128f6bf",
                "keywords": [],
                "children": [
                  {
                    "查询日志": {
                      "node_id": "mysql-4964024c989c4346861b67ae013d746c",
                      "keywords": [
                        "general log",
                        "查询日志"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "慢查询日志": {
                      "node_id": "mysql-6f74222f9e3d422c87b6b2dd30c2cc80",
                      "keywords": [
                        "slow log",
                        "慢查询日志"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "错误日志": {
                      "node_id": "mysql-7645195ec078406c9303d39ea9c3738c",
                      "keywords": [
                        "日志",
                        "错误日志"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "二进制日志": {
                      "node_id": "mysql-ab25d57bc9704572bc3c54abb83b769b",
                      "keywords": [
                        "binlog"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "备份与恢复": {
                "node_id": "mysql-9f5d58c9e09b4ec79f8e7fc8c4e776a0",
                "keywords": [],
                "children": [
                  {
                    "数据导入和导出": {
                      "node_id": "mysql-e2eefb85984643f8adb95f4eee16bc8f",
                      "keywords": [
                        "dump",
                        "restore",
                        "import",
                        "backup",
                        "导入",
                        "导出"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "灾难恢复": {
                      "node_id": "mysql-76b4d2f260f94ea1a6692d5a8dab2709",
                      "keywords": [
                        "灾难恢复"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "用户和权限": {
                "node_id": "mysql-c9ac9937371b403ebe252a9c48bc359e",
                "keywords": [],
                "children": [
                  {
                    "创建普通用户": {
                      "node_id": "mysql-25808aa5b4ba4e78bd3dc59e09b403ed",
                      "keywords": [
                        "create user"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "为用户授权": {
                      "node_id": "mysql-291ab4c99fa945ae8629b1956bc1ecc9",
                      "keywords": [
                        "grant",
                        "user",
                        "role",
                        "授权",
                        "角色"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "查看用户权限": {
                      "node_id": "mysql-d2b788a8200140a693297356c02ce872",
                      "keywords": [
                        "privilege",
                        "查看权限"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "撤销用户权限": {
                      "node_id": "mysql-d47605d2cb134cdc98e6fbefc0651e8f",
                      "keywords": [
                        "revoke",
                        "撤销",
                        "revoke"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "修改用户密码": {
                      "node_id": "mysql-12a66fd74a2741bbbfc0df7a59801123",
                      "keywords": [
                        "change password",
                        "修改密码"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "删除用户": {
                      "node_id": "mysql-0bb8146d9ee54ff6934e45ce4e3b2f99",
                      "keywords": [
                        "drop user",
                        "删除用户"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "限制用户使用资源": {
                      "node_id": "mysql-ab80d0d8af69427ab91a65b89de7e30c",
                      "keywords": [
                        "resources",
                        "limit",
                        "资源"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            }
          ],
          "keywords_must": [],
          "keywords_forbid": [],
          "group": 0
        }
      },
      {
        "MySQL高阶": {
          "node_id": "mysql-fba12490eaea4ed8b50866f878896338",
          "keywords": [],
          "children": [
            {
              "深入索引": {
                "node_id": "mysql-5b56965051d342849d665acb5f55a734",
                "keywords": [],
                "children": [
                  {
                    "唯一索引": {
                      "node_id": "mysql-db7153c698e8442eb5f71e8ec2f2e6cd",
                      "keywords": [
                        "unique",
                        "唯一约束"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "全值匹配": {
                      "node_id": "mysql-391b51e398764531abf5a6e036699cc8",
                      "keywords": [
                        "全值"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "全值匹配"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "匹配顺序": {
                      "node_id": "mysql-bdc593e4b7ea4c8aa248227ff2e1221d",
                      "keywords": [
                        "match",
                        "匹配顺序",
                        "匹配最左前缀"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "匹配顺序"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "组合索引": {
                      "node_id": "mysql-ce1f863b4d254d2aadb6ce2331122d16",
                      "keywords": [
                        "compose",
                        "combine"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "空间索引": {
                      "node_id": "mysql-2f417818ad3449268396157cbb9d4d9c",
                      "keywords": [
                        "空间索引",
                        "几何索引",
                        "GEO",
                        "GEOMETRY"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "全文索引": {
                      "node_id": "mysql-ba3fc0140b5842bb949c591d059e3269",
                      "keywords": [
                        "full text index",
                        "fti"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "隐藏索引": {
                      "node_id": "mysql-c57e1195b0914cd38798ce029156ec87",
                      "keywords": [
                        "invisible",
                        "visible",
                        "隐藏索引"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "函数和表达式索引": {
                      "node_id": "mysql-7745c930b53c48d18afb4ba14e0510a7",
                      "keywords": [
                        "索引",
                        "index",
                        "performance",
                        "优化",
                        "表达式索引"
                      ],
                      "children": [],
                      "keywords_must": [
                        "索引",
                        "index",
                        "performance",
                        "优化"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "SQL高级技巧": {
                "node_id": "mysql-0cc4dd0b6c024a9e92abb4226bf7ff79",
                "keywords": [],
                "children": [
                  {
                    "CTE和递归查询": {
                      "node_id": "mysql-753300de6ef94af7be40fb91a05421a6",
                      "keywords": [
                        "cte",
                        "递归查询",
                        "recursive"
                      ],
                      "children": [],
                      "keywords_must": [
                        "cte",
                        "递归查询",
                        "recursive"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "Window Function": {
                      "node_id": "mysql-0f7b5745d0b44251a678bbd2bbee5f2e",
                      "keywords": [
                        "函数",
                        "function"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "透视表 ": {
                      "node_id": "mysql-88200dcbd2e848a5a1d74c086d8abe57",
                      "keywords": [
                        "透视表",
                        "交叉透视表",
                        "pivot"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 1
                    }
                  },
                  {
                    "Double Not Exists": {
                      "node_id": "mysql-72761d60ad7c4a9a9c87435daca246b9",
                      "keywords": [
                        "exists",
                        "not exists",
                        "double not exists"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "写入和冲突": {
                      "node_id": "mysql-f9f2ae841cf14d079c8433c833d3396d",
                      "keywords": [
                        "conflict",
                        "冲突",
                        "唯一约束"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysql"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "事务": {
                      "node_id": "mysql-a00dadd0e1e945e597adcd2b71452e07",
                      "keywords": [
                        "事务",
                        "transaction"
                      ],
                      "children": [],
                      "keywords_must": [
                        [
                          "mysql",
                          "事务"
                        ]
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "过程化编程": {
                "node_id": "mysql-918d2ed90a1546e1aab23036eee5539a",
                "keywords": [],
                "children": [
                  {
                    "IF": {
                      "node_id": "mysql-d7f86bc2fcbb4b83a11f2ed73bde7ac0",
                      "keywords": [
                        "if"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "LOOP": {
                      "node_id": "mysql-8ef7f9a1bba04bd782d80e9459446228",
                      "keywords": [
                        "loop",
                        "循环"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "REPEAT": {
                      "node_id": "mysql-923c7bbf96cf4630a5dfb36f15e62d24",
                      "keywords": [
                        "repeat",
                        "循环"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "WHILE": {
                      "node_id": "mysql-8bbe6f55f32b4a4a8a6011c5748b36fa",
                      "keywords": [
                        "while"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    " 游标": {
                      "node_id": "mysql-459fd14ff096438d9b6460270bec4754",
                      "keywords": [
                        "cursor",
                        "游标"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "设计优化": {
                "node_id": "mysql-d4ff221a05884e6dbf0c5c2e5c8a0d48",
                "keywords": [],
                "children": [
                  {
                    "生成列": {
                      "node_id": "mysql-d3611482eecd4055816df4b1dd9ff90d",
                      "keywords": [
                        "generated"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    " 范式设计": {
                      "node_id": "mysql-bee8db3dd5354a42bb50277fe4cb2913",
                      "keywords": [
                        "normalization"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "反范式设计": {
                      "node_id": "mysql-3e4c837b471c454c90bfbc32445f2780",
                      "keywords": [
                        "反范式",
                        "anti normalization"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "增加中间表": {
                      "node_id": "mysql-a2ddae1b044149ecbb74db3b6eb32721",
                      "keywords": [
                        "middle",
                        "中间表"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  },
                  {
                    "分析数据表": {
                      "node_id": "mysql-cde6eae01784468fa0171ff3042f221f",
                      "keywords": [
                        "analyze table",
                        "分析数据表"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 0
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "运维与架构": {
                "node_id": "mysql-1312f53e4f41430bab7873901dd64433",
                "keywords": [],
                "children": [
                  {
                    "主从复制": {
                      "node_id": "mysql-cc8606a40aac43cb8b063a65f51e4df1",
                      "keywords": [
                        "slave",
                        "master",
                        "standby"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "添加从库": {
                      "node_id": "mysql-1c778aa1adfd43d4ac9da32df9e44238",
                      "keywords": [
                        "slave",
                        "master",
                        "standby",
                        "add slave"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "从主从复制到链式复制": {
                      "node_id": "mysql-88333dcb84a946a78bfd9f413c6e795b",
                      "keywords": [
                        "chains",
                        "slave",
                        "master",
                        "主从复制",
                        "replication"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "从链式复制到主从复制": {
                      "node_id": "mysql-2f6f847907d4415788e98d2f70f64d3c",
                      "keywords": [
                        "chains",
                        "slave",
                        "master",
                        "主从复制",
                        "replication"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "多源复制": {
                      "node_id": "mysql-91ba7f7a6b684b8aad01abd583cf0442",
                      "keywords": [
                        "多源复制",
                        "multimaster",
                        "replication"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "复制过滤器": {
                      "node_id": "mysql-b3cba2e9c7ea46d5beeb1948b41a74d5",
                      "keywords": [
                        "复制过滤器",
                        "filter",
                        "replication"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "延迟复制": {
                      "node_id": "mysql-9dee640902204fcbbe780c0f04bc7c18",
                      "keywords": [
                        "delay",
                        "延迟复制",
                        "replication"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "查询优化": {
                "node_id": "mysql-310130dd922d4e2b832891cc0e157cbf",
                "keywords": [],
                "children": [
                  {
                    " SHOW STATUS": {
                      "node_id": "mysql-3574b2e5c9ca475789d9d582d7726906",
                      "keywords": [
                        "show status"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    " SHOW PROFILE": {
                      "node_id": "mysql-f0b12126dd3e4be09010a308a822bc32",
                      "keywords": [
                        "show profile"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    " EXPLAIN": {
                      "node_id": "mysql-a42f617d4eb54aabbc649bdde4485117",
                      "keywords": [
                        "explain",
                        "explain analyze"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "写优化": {
                "node_id": "mysql-284cf77b823540c38370d5cd70ada265",
                "keywords": [],
                "children": [
                  {
                    "插入优化": {
                      "node_id": "mysql-4e93793f51a24f0eb00f7824ecc8929b",
                      "keywords": [],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "删除优化": {
                      "node_id": "mysql-ff4222264013437da2214ff77ca92961",
                      "keywords": [
                        "delete",
                        "performance",
                        "优化",
                        "删除"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            },
            {
              "命令行工具": {
                "node_id": "mysql-1d276461e42a4aba8bfa67b596c487f9",
                "keywords": [],
                "children": [
                  {
                    "mysqladmin": {
                      "node_id": "mysql-daca74b56aca48cea2da14078b518051",
                      "keywords": [
                        "mysqladmin",
                        "shell"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysqladmin"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "myisampack": {
                      "node_id": "mysql-b34e3244a8ba4166bd22bc4fe5f7d8db",
                      "keywords": [
                        "myisampack",
                        "myisam",
                        "pack"
                      ],
                      "children": [],
                      "keywords_must": [
                        "myisampack"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "mysqlbinlog": {
                      "node_id": "mysql-fe9caf0e07a94efc8b7c8f2a4c683efe",
                      "keywords": [
                        "mysqlbinlog",
                        "binlog",
                        "二进制日志"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysqlbinlog"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "mysqlcheck": {
                      "node_id": "mysql-d9cdafd993bf41bbb860e5087dd54bd1",
                      "keywords": [
                        "mysqlcheck"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysqlcheck"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "mysqlshow": {
                      "node_id": "mysql-430b0de67c294d64aff35c85fec8393e",
                      "keywords": [],
                      "children": [],
                      "keywords_must": [
                        "mysqlshow"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "mysqlpump": {
                      "node_id": "mysql-c5b92946b8824ceea97b20f26946bb76",
                      "keywords": [
                        "mysqlpump"
                      ],
                      "children": [],
                      "keywords_must": [
                        "mysqlpump"
                      ],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 0
              }
            },
            {
              "服务器优化": {
                "node_id": "mysql-3aa068fd95ea4f3bac2c5fa8d6ec0951",
                "keywords": [],
                "children": [
                  {
                    "配置项优化": {
                      "node_id": "mysql-6d4f4d7aecfb4546a8163256859562e1",
                      "keywords": [
                        "optimize",
                        "performance",
                        "configuration"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "performance_schema": {
                      "node_id": "mysql-36d638345c1949f7bb032baf8d9f996e",
                      "keywords": [
                        "performance",
                        "performance schema",
                        "优化"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  },
                  {
                    "sys数据库": {
                      "node_id": "mysql-3d5c8647b1674de18c8348454d16fee5",
                      "keywords": [
                        "sys",
                        "performance"
                      ],
                      "children": [],
                      "keywords_must": [],
                      "keywords_forbid": [],
                      "group": 2
                    }
                  }
                ],
                "keywords_must": [],
                "keywords_forbid": [],
                "group": 2
              }
            }
          ],
          "keywords_must": [],
          "keywords_forbid": [],
          "group": 0
        }
      }
    ],
    "keywords_must": [],
    "keywords_forbid": [],
    "group": 0
  }
}