diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/3.\346\234\200\345\260\217\345\200\274/min.md" "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/3.\346\234\200\345\260\217\345\200\274/min.md" index 96aba9837e7dc261758ee6d25b013e3c666776a3..ca777de902e7131c9111c6c7841da3df9b3bbabb 100644 --- "a/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/3.\346\234\200\345\260\217\345\200\274/min.md" +++ "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/3.\346\234\200\345\260\217\345\200\274/min.md" @@ -43,5 +43,5 @@ select dept, min(salary) from employee; ### D ```mysql -select sum(total) from orders having deal and unit_price > 1000; +select dept, min(total) from employee; ``` \ No newline at end of file diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/avg.json" "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/avg.json" new file mode 100644 index 0000000000000000000000000000000000000000..6a2d3d9ed1624d9da38e69d10a04dcd01c4e7c70 --- /dev/null +++ "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/avg.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": "ccat", + "source": "avg.md", + "notebook_enable": false, + "exercise_id": "c6ff6b73f6844327b71b6b0630fedcaa" +} \ No newline at end of file diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/avg.md" "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/avg.md" new file mode 100644 index 0000000000000000000000000000000000000000..05fa674185e973b66f719dacffc9629844b82c82 --- /dev/null +++ "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/avg.md" @@ -0,0 +1,47 @@ +# 平均值练习 + +Joe 想要得到 employee 表 + +```mysql +create table employee +( + id serial primary key, + name varchar(256), + dept varchar(256), + salary decimal(12, 4) +); +``` + +中每个部门的平均工资信息，这条查询应该怎么写？ + +## 答案 + +```mysql +select dept, avg(salary) from employee group by dept; +``` + +## 选项 + +### A + +```mysql +select dept, avg(salary) from employee; +``` + +### B + +```mysql +select dept, avg(salary) from employee; +``` + +### C + +```mysql +select dept, avg(salary) from employee; +``` + +### D + +```mysql +select dept, avg(salary) from employee ; +``` \ No newline at end of file diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/config.json" "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/config.json" index 1234fcca448cd8033a19cd3044f7444c0566047f..f5c65a2bca71244ba697237162d31fb54e1e8a6b 100644 --- "a/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/config.json" +++ "b/data/2.MySQL\344\270\255\351\230\266/3.\350\201\232\345\220\210\345\222\214\345\210\206\347\273\204/5. \345\271\263\345\235\207\345\200\274/config.json" @@ -2,11 +2,10 @@ "node_id": "mysql-11462fccf9d24d17a372d5c60af90f54", "keywords": [], "children": [], - "export": [], - "keywords_must": [ - ["mysql", "平均值"], - ["mysql", "avg"] + "export": [ + "avg.json" ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/1.\345\244\215\347\224\250\346\225\260\346\215\256\345\272\223\350\277\236\346\216\245/config.json" "b/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/1.\345\244\215\347\224\250\346\225\260\346\215\256\345\272\223\350\277\236\346\216\245/config.json" deleted file mode 100644 index b4ac5efe6615310456a37e079e4a6e260147f71a..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/1.\345\244\215\347\224\250\346\225\260\346\215\256\345\272\223\350\277\236\346\216\245/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-769c096b229842239e2ba2f8d1c768d3", - "keywords": ["连接复用", "连接池"], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/2.\345\207\217\345\260\221\346\225\260\346\215\256\350\256\277\351\227\256/config.json" "b/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/2.\345\207\217\345\260\221\346\225\260\346\215\256\350\256\277\351\227\256/config.json" deleted file mode 100644 index a9b6a59b021c83600018eca5aaf0fd1552d06edc..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/2.\345\207\217\345\260\221\346\225\260\346\215\256\350\256\277\351\227\256/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-d7b339f2b2434e3fbd3721b7cd1abc1a", - "keywords": ["performance", "application", "io"], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/3.\345\274\200\345\220\257\346\237\245\350\257\242\347\274\223\345\255\230/config.json" "b/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/3.\345\274\200\345\220\257\346\237\245\350\257\242\347\274\223\345\255\230/config.json" deleted file mode 100644 index 8c845f5475236461388d5b244e9f9383f10fc0e0..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/3.\345\274\200\345\220\257\346\237\245\350\257\242\347\274\223\345\255\230/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-8973ee6a0cb045b7bcf623b4e5757baa", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/4.\344\275\277\347\224\250\345\244\226\351\203\250\347\274\223\345\255\230/config.json" "b/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/4.\344\275\277\347\224\250\345\244\226\351\203\250\347\274\223\345\255\230/config.json" deleted file mode 100644 index a6f229deedc5ba6668adc2359f5d198f30068ae1..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/4.\344\275\277\347\224\250\345\244\226\351\203\250\347\274\223\345\255\230/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-7f86d4e58a514a44bce09a19595f9cab", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/5.\345\210\206\345\270\203\345\274\217 MySQL \346\236\266\346\236\204/config.json" "b/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/5.\345\210\206\345\270\203\345\274\217 MySQL \346\236\266\346\236\204/config.json" deleted file mode 100644 index c800640cdf171fd79d80877c0fc75975c6742bf5..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/5.\345\210\206\345\270\203\345\274\217 MySQL \346\236\266\346\236\204/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-402ec368b74f4c33b33c812e9f762d3a", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/config.json" "b/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/config.json" deleted file mode 100644 index 37bc59af5ef13b862a92f657059f249a660a329c..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/10.\345\272\224\347\224\250\347\250\213\345\272\217\344\274\230\345\214\226/config.json" +++ /dev/null @@ -1,7 +0,0 @@ -{ - "node_id": "mysql-288d4606c1ae4f49a0ab79212bc0ff2b", - "keywords": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 2 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/config.json" index 23e3f783af14ab2f21f0290dea27cbd6574e3a68..8323e5359398bfc1b2874b585ebe88d6db27586f 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/config.json" @@ -2,7 +2,9 @@ "node_id": "mysql-3e4c837b471c454c90bfbc32445f2780", "keywords": [], "children": [], - "export": [], + "export": [ + "slack.json" + ], "keywords_must": [], "keywords_forbid": [], "group": 0 diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/slack.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/slack.json" new file mode 100644 index 0000000000000000000000000000000000000000..ba161eb430981c42147c3312afbfd7eb1ea57ebc --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/slack.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": "ccat", + "source": "slack.md", + "notebook_enable": false, + "exercise_id": "d62e33f550494f849f87b62acdcf9d0a" +} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/slack.md" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/slack.md" new file mode 100644 index 0000000000000000000000000000000000000000..2a2c407d220ce050dec5eddcc6237fb43d6435b5 --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/4.\345\217\215\350\214\203\345\274\217\350\256\276\350\256\241/slack.md" @@ -0,0 +1,42 @@ +# 反范式设计 + +反范式优化的主要动机和思路是： + +1. 通过适当增加冗余字段，减少连接查询的次数和复杂度 +2. 对于经常发生的聚合计算，如果对实时正确性要求不高，可以缓存中间结果，减少实时的聚合计算压力 +3. 用适度的写冗余，换取读操作的大幅优化 +4. 适当的放宽索引，可以优化局限于少数字段的查询性能 + +## 答案 + +全部都是 + +## 选项 + +### A + +全部都不对 + +### B + +``` +1, 2, 3 +``` + +### C + +``` +2, 3, 4 +``` + +### D + +``` +2, 3 +``` + +### E + +``` +3, 4 +``` \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/config.json" similarity index 100% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/config.json" diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.json" similarity index 100% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.json" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.json" diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.md" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.md" similarity index 100% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.md" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\345\242\236\345\212\240\344\270\255\351\227\264\350\241\250/daily_payment2.md" diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\346\270\205\347\220\206\351\207\215\345\244\215\347\264\242\345\274\225\345\222\214\345\206\227\344\275\231\347\264\242\345\274\225/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\346\270\205\347\220\206\351\207\215\345\244\215\347\264\242\345\274\225\345\222\214\345\206\227\344\275\231\347\264\242\345\274\225/config.json" deleted file mode 100644 index 517b5a9d27992b65719369406e1465c56bfcbdfc..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/5.\346\270\205\347\220\206\351\207\215\345\244\215\347\264\242\345\274\225\345\222\214\345\206\227\344\275\231\347\264\242\345\274\225/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-06bc5338054a40fc90b24333ee2b9125", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/7.\345\210\206\346\236\220\346\225\260\346\215\256\350\241\250/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\210\206\346\236\220\346\225\260\346\215\256\350\241\250/config.json" similarity index 100% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/7.\345\210\206\346\236\220\346\225\260\346\215\256\350\241\250/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/6.\345\210\206\346\236\220\346\225\260\346\215\256\350\241\250/config.json" diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/8.\346\243\200\346\237\245\346\225\260\346\215\256\350\241\250/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/7.\346\243\200\346\237\245\346\225\260\346\215\256\350\241\250/config.json" similarity index 82% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/8.\346\243\200\346\237\245\346\225\260\346\215\256\350\241\250/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/7.\346\243\200\346\237\245\346\225\260\346\215\256\350\241\250/config.json" index ea074970bbc290e76bcb06979e2ce273a7c7ac78..655b9754463fab38d38390efc30869b61f70e780 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/8.\346\243\200\346\237\245\346\225\260\346\215\256\350\241\250/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/7.\346\243\200\346\237\245\346\225\260\346\215\256\350\241\250/config.json" @@ -1,6 +1,6 @@ { "node_id": "mysql-fbcc654d6a86452aa349d2ed6003adb6", - "keywords": [], + "keywords": ["show profile"], "children": [], "export": [], "keywords_must": [], diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/9.\344\274\230\345\214\226\346\225\260\346\215\256\350\241\250/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/8.\344\274\230\345\214\226\346\225\260\346\215\256\350\241\250/config.json" similarity index 100% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/9.\344\274\230\345\214\226\346\225\260\346\215\256\350\241\250/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/8.\344\274\230\345\214\226\346\225\260\346\215\256\350\241\250/config.json" diff --git "a/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/10.\346\213\206\345\210\206\346\225\260\346\215\256\350\241\250/config.json" "b/data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/9.\346\213\206\345\210\206\346\225\260\346\215\256\350\241\250/config.json" similarity index 100% rename from "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/10.\346\213\206\345\210\206\346\225\260\346\215\256\350\241\250/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/5.\350\256\276\350\256\241\344\274\230\345\214\226/9.\346\213\206\345\210\206\346\225\260\346\215\256\350\241\250/config.json" diff --git "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/bulk_insert.json" "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/bulk_insert.json" new file mode 100644 index 0000000000000000000000000000000000000000..86f84e571002e743ca62a6585f7da84a5045d249 --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/bulk_insert.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": null, + "source": "bulk_insert.md", + "notebook_enable": false, + "exercise_id": "936ee1ecbd4a4b9aa795fa537e24f659" +} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/bulk_insert.md" "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/bulk_insert.md" new file mode 100644 index 0000000000000000000000000000000000000000..340e4ee582b103dfba3589564b6b60653ea520cc --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/bulk_insert.md" @@ -0,0 +1,53 @@ +# 批量写入 + +Joe 需要为数据组准备一个离线数据库，这个数据库的数据量很大。 +下面这些措施中有哪些可以帮助 Joe 更快的写入这些数据？ + +1. 使用`ALTER TABLE t_table_name DISABLE KEYS;`禁用索引，完成工作后用`ALTER TABLE t_table_name ENABLE KEYS;`启用索引 +2. 使用`SET UNIQUE_CHECKS = 0;`禁用唯一性检查，完成工作后用`SET UNIQUE_CHECKS = 1;`恢复唯一性检查 +3. 使用`SET foreign_key_checks = 0;`禁用外键检查，完成工作后`SET foreign_key_checks = 1;`恢复外键检查 +4. 使用`insert values(...),(...),(...)...`批量插入数据 +5. 使用`LOAD DATA INFILE ‘data_file_path’ INTO TABLE table_name;`批量导入数据 +6. 对 InnoDB 表使用 `SET autocommit = 0;` 禁用自动事务，完成工作后用 `SET autocommit = 1;` + +## 答案 + +全部都对 + +## 选项 + +### A + +``` +1, 2, 3, 4, 5 +``` + +### B + +``` +2, 3, 4, 5 +``` + +### C + +``` +2, 3, 4, 6 +``` + +### D + +``` +1, 2, 3, 4 +``` + +### D + +``` +3, 4, 5, 6 +``` + +### E + +``` +3, 4 +``` \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/config.json" "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/config.json" index 0d0b1092b91b95656aa7e0defde8fc9fbf54eb4d..936db8b3b746f705036caa925e0f7b999b3bf675 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/1.\346\217\222\345\205\245\344\274\230\345\214\226/config.json" @@ -2,7 +2,9 @@ "node_id": "mysql-4e93793f51a24f0eb00f7824ecc8929b", "keywords": [], "children": [], - "export": [], + "export": [ + "bulk_insert.json" + ], "keywords_must": [], "keywords_forbid": [], "group": 0 diff --git "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/config.json" "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/config.json" index 3d001ce48d02261e6ccd41f85fd7e3b9eef711ee..a558e8260079ae1d970b53aa3536e980daaa007c 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/config.json" @@ -1,8 +1,10 @@ { "node_id": "mysql-ff4222264013437da2214ff77ca92961", - "keywords": [], + "keywords": ["delete", "performance", "优化", "删除"], "children": [], - "export": [], + "export": [ + "performance_delete.json" + ], "keywords_must": [], "keywords_forbid": [], "group": 0 diff --git "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/performance_delete.json" "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/performance_delete.json" new file mode 100644 index 0000000000000000000000000000000000000000..94bcced7afeeee8fa6203bd66a5a91fbbb34ca3e --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/performance_delete.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": null, + "source": "performance_delete.md", + "notebook_enable": false, + "exercise_id": "105bda06ce03418aaad1422b61767cb6" +} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/performance_delete.md" "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/performance_delete.md" new file mode 100644 index 0000000000000000000000000000000000000000..80c490ebc394776730f8617af54fafd17dd9758e --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/8.\345\206\231\344\274\230\345\214\226/2.\345\210\240\351\231\244\344\274\230\345\214\226/performance_delete.md" @@ -0,0 +1,45 @@ +# 快速删除 + +Joe 需要删除数据分析库中 orders 表的数据，orders按时间分区，因为是分析部门离线使用，不需要考虑并发，下列哪些操作可以更快的删除这些数据？ + +1. 使用 `truncate from orders`; +2. 可以执行 `ALTER TABLE orders DROP PARTITION partition_name;` 删除指定分区 +3. 去掉唯一约束然后 `delete from orders where 1=1` +4. 使用可写游标，一次一万行滚动删除 +5. `drop table orders` 删除后重建 + +## 答案 + +``` +1, 2, 5 +``` + +## 选项 + +### A + +全部选项都可以 + +### B + +``` +1, 2, 3, 4 +``` + +### C + +``` +3, 4 +``` + +### D + +``` +2, 3 +``` + +### E + +``` +2, 3， 4 +``` \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\347\241\254\344\273\266\351\205\215\347\275\256/config.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\347\241\254\344\273\266\351\205\215\347\275\256/config.json" deleted file mode 100644 index cfbf92cb394ac98a4ba2f2f7f136c43187372b30..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\347\241\254\344\273\266\351\205\215\347\275\256/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-f2a76883814745b9979541ed4117754f", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/config.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/config.json" similarity index 77% rename from "data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/config.json" index ca9125041ddd61303ca66004c72ba883bd9565a7..914f278e6958e811166e8849af26b4bf794d2329 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/config.json" @@ -2,7 +2,9 @@ "node_id": "mysql-6d4f4d7aecfb4546a8163256859562e1", "keywords": [], "children": [], - "export": [], + "export": [ + "configuration.json" + ], "keywords_must": [], "keywords_forbid": [], "group": 0 diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/configuration.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/configuration.json" new file mode 100644 index 0000000000000000000000000000000000000000..289928e48350cd127e85ba4cef6838913d28e698 --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/configuration.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": null, + "source": "configuration.md", + "notebook_enable": false, + "exercise_id": "b90270843de54822a1556cb47ca49394" +} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/configuration.md" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/configuration.md" new file mode 100644 index 0000000000000000000000000000000000000000..9cdf77ccaf10c1cb46403e068f96b7d37a1da35e --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/1.\351\205\215\347\275\256\351\241\271\344\274\230\345\214\226/configuration.md" @@ -0,0 +1,47 @@ +# 配置项优化 + +Joe 要帮助开发部优化交易数据库的性能，下面哪些优化是可能有帮助的？ + +1. 适当增大MySQL的最大连接数 max_connections， 提高并发响应能力。 +2. 适当增大 table_cache，提高同时打开表的个数。此参数需根据业务需要有节制的上调 +3. 适当增大 table_open_cache，提高数据表的缓存数量。 +4. 适当调整 innodb_buffer_pool_size：此配置项决定着InnoDB存储引擎的数据表的数据和索引数据的最大缓冲区大小。一般可以分配80%的物理内存。 +5. 适当增加 innodb_log_buffer_size，减少频繁的日志写操作。 +6. 如果存在较多的排序操作，调整 sort_buffer_size：排序缓冲区的大小。 +7. read_buffer_size：数据表的读缓冲区。适当增加此配置项的值，能够提高MySQL的并发读能力。 +8. back_log：如果MySQL服务器需要在短时间内处理大量的连接请求，则可以适当增大此配置项的值。 +9. thread_cache_size：MySQL缓存的数据库服务线程的最大线程数。当有大量客户端连接MySQL时，可以适当增大此配置项的值。 +10. innodb_lock_wait_timeout：InnoDB存储引擎等待行锁的时间，默认值为50ms。对于实时要求高的应用，可以将此配置项的值适当调小。 + +## 答案 + +全部都是 + +## 选项 + +### A + +``` +1, 2, 3, 4, 5 +``` + +### B + +``` +1, 2, 3, 4, 5, 6, 7, 8 +``` + +### C + +``` +1, 2, 3, 4, 5, 6, 7, 8 +``` + +### D + +``` +4, 5, 6, 7, 8 +``` + + + diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/4.performance_schema/config.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/config.json" similarity index 51% rename from "data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/4.performance_schema/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/config.json" index 23bf52ae1b328b41e70d591ed886c3da162a4d1f..0be41d18655329e108f8990a144c67c55d9a7bae 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/4.performance_schema/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/config.json" @@ -1,8 +1,14 @@ { "node_id": "mysql-36d638345c1949f7bb032baf8d9f996e", - "keywords": [], + "keywords": [ + "performance", + "performance schema", + "优化" + ], "children": [], - "export": [], + "export": [ + "performance_schema.json" + ], "keywords_must": [], "keywords_forbid": [], "group": 0 diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/performance_schema.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/performance_schema.json" new file mode 100644 index 0000000000000000000000000000000000000000..e1700098f1fa83059f3f65470cf348e0e456ba2d --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/performance_schema.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": null, + "source": "performance_delete.md", + "notebook_enable": false, + "exercise_id": "cea8e3db523b4f1fb9a502e1d9c27d7b" +} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/performance_schema.md" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/performance_schema.md" new file mode 100644 index 0000000000000000000000000000000000000000..6cadbf663d34d4ad2971cf9ed2609f73d735e059 --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.performance_schema/performance_schema.md" @@ -0,0 +1,29 @@ +# # Performance Schema + +Joe 为交易库开启了 Performance Schema 配置。那么对于交易数据库的优化，哪些是他应该关注的？ + +1. 从 `performance_schema.events_waits_current` 活跃线程的执行操作 +2. 从 `performance_schema.file_summary_by_event_name` 获取被频繁使用的文件，特别是经常需要等待的文件 +3. 从 `performance.events_statements_summary_by_diges` 获取 MySQL 的统计信息 + +## 答案 + +所有都是。 + +## 选项 + +### A + +所有都不是，performance_schema 中不包含这些信息，它们来自 Sys 数据库。 + +### B + +``` +1, 2 +``` + +### C + +``` +2, 3 +``` \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.\347\263\273\347\273\237\345\206\205\346\240\270/config.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.\347\263\273\347\273\237\345\206\205\346\240\270/config.json" deleted file mode 100644 index 278fb3271e110d68ba99f06aee4dde7f6918a6e4..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/2.\347\263\273\347\273\237\345\206\205\346\240\270/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-4a1bb52626b04dabac78af8eafea868e", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/5.sys\346\225\260\346\215\256\345\272\223/config.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/config.json" similarity index 81% rename from "data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/5.sys\346\225\260\346\215\256\345\272\223/config.json" rename to "data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/config.json" index b352ea69994d296dc597ab97c378053be64cb80a..130b9fbe53b08ed0ca40203829635b85873e40c6 100644 --- "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/5.sys\346\225\260\346\215\256\345\272\223/config.json" +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/config.json" @@ -2,7 +2,9 @@ "node_id": "mysql-3d5c8647b1674de18c8348454d16fee5", "keywords": [], "children": [], - "export": [], + "export": [ + "sys.json" + ], "keywords_must": [], "keywords_forbid": [], "group": 0 diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/sys.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/sys.json" new file mode 100644 index 0000000000000000000000000000000000000000..0a3d9388e39e053a129b70cc29fa43cc38bfbc15 --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/sys.json" @@ -0,0 +1,7 @@ +{ + "type": "code_options", + "author": null, + "source": "sys.md", + "notebook_enable": false, + "exercise_id": "ed53fabf084c4ceb99952f5196412b49" +} \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/sys.md" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/sys.md" new file mode 100644 index 0000000000000000000000000000000000000000..fbc267837621982235cfaacec404e6fa999843bb --- /dev/null +++ "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/3.sys\346\225\260\346\215\256\345\272\223/sys.md" @@ -0,0 +1,41 @@ +# Sys 数据库 + +Joe 计划从交易数据库服务器的 sys 系统库获取一些优化线索，下列哪些操作是他需要关注的？ + +1. 通过 `SELECT * FROM sys.schema_unused_indexes` 找到未使用的索引 +2. 通过 `SELECT * FROM sys.schema_redundant_indexes` 找到冗余索引 +3. 通过 `SELECT * FROM sys.user_summary` 观察每用户资源消耗 +4. 通过 `SELECT * FROM sys.host_summary` 观察每连接消耗 + +提示：交易数据库仅由DBA和应用程序连接，应用程序使用大量相同配置和登录信息的连接访 +问数据库，交易系统访问数据库时，希望尽可能的快速、高并发、每个查询的时间尽可能短。 + +## 答案 + +``` +1, 2, 4 +``` + +## 选项 + +### A + +所有都是 + +### B + +``` +3 +``` + +### C + +``` +1, 3, 4 +``` + +### C + +``` +2, 3, 4 +``` \ No newline at end of file diff --git "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/6.\350\265\204\346\272\220\347\273\204/config.json" "b/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/6.\350\265\204\346\272\220\347\273\204/config.json" deleted file mode 100644 index afab7201e1a3484764f1344ade652bf32fab81eb..0000000000000000000000000000000000000000 --- "a/data/3.MySQL\351\253\230\351\230\266/9.\346\234\215\345\212\241\345\231\250\344\274\230\345\214\226/6.\350\265\204\346\272\220\347\273\204/config.json" +++ /dev/null @@ -1,9 +0,0 @@ -{ - "node_id": "mysql-715cc1f656df4b099d952145a53dd006", - "keywords": [], - "children": [], - "export": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 -} \ No newline at end of file diff --git a/data/tree.json b/data/tree.json index ec7203409f6c5e5755117b8f1bc5848398444a4b..3ac0b3925d7e45300c3c0bb9254260b7c994e12d 100644 --- a/data/tree.json +++ b/data/tree.json @@ -23,12 +23,7 @@ "node_id": "mysql-8e971f3c569a4e56bb83b5d75a2a425f", "keywords": [], "children": [], - "keywords_must": [ - [ - "数据库", - "概念" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -38,20 +33,20 @@ "node_id": "mysql-925f9d57c7794e5391fb790bcdbf43c6", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "概念" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } } ], - "keywords_must": [], + "keywords_must": [ + "关系型数据库", + "database", + "relational", + "rdbms" + ], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -68,10 +63,7 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "安装" - ] + "安装" ], "keywords_forbid": [], "group": 1 @@ -87,10 +79,7 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "登录" - ] + "登录" ], "keywords_forbid": [], "group": 1 @@ -99,7 +88,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -117,18 +106,7 @@ "删除数据库" ], "children": [], - "keywords_must": [ - [ - "mysql", - "数据库", - "创建" - ], - [ - "mysql", - "数据库", - "删除" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -138,13 +116,7 @@ "node_id": "mysql-426b0b1e04a4462e984ee77ca536f916", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "创建", - "表" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -154,12 +126,7 @@ "node_id": "mysql-401a4084d56c4123afa3ced3aa0e5e98", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "编码" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -172,12 +139,7 @@ "存储引擎" ], "children": [], - "keywords_must": [ - [ - "mysql", - "存储引擎" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -185,7 +147,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -198,12 +160,7 @@ "node_id": "mysql-1418d1a710ab4e7c8cacb0bad047179e", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "数值类型" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -213,16 +170,7 @@ "node_id": "mysql-7256fe88bcf241d486c9e2e254ef66d9", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "日期类型" - ], - [ - "mysql", - "时间类型" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -238,13 +186,7 @@ "文本" ], "children": [], - "keywords_must": [ - [ - "mysql", - "文本", - "字符串" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -258,13 +200,7 @@ "二进制" ], "children": [], - "keywords_must": [ - [ - "mysql", - "二进制", - "字符串" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -272,7 +208,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -285,12 +221,7 @@ "node_id": "mysql-fcca525ab0f04f16834ded9b2b3f38a4", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "插入" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -300,12 +231,7 @@ "node_id": "mysql-2eb9e9d351e848f580b70cf9e7b93280", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "修改" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -315,12 +241,7 @@ "node_id": "mysql-3cae643e21644d6d937d69b59014922f", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "删除" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -328,7 +249,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -344,12 +265,7 @@ "select" ], "children": [], - "keywords_must": [ - [ - "mysql", - "select" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -359,12 +275,7 @@ "node_id": "mysql-91cc9c73e58945d3ba654370a057a1c7", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "where" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -377,12 +288,7 @@ "运算符" ], "children": [], - "keywords_must": [ - [ - "mysql", - "运算符" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -392,12 +298,7 @@ "node_id": "mysql-07b85d4c87c84a62a9b55299250cd9a3", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "函数" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -405,7 +306,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -421,12 +322,7 @@ "mysql" ], "children": [], - "keywords_must": [ - [ - "mysql", - "命令行" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -439,9 +335,7 @@ "shell" ], "children": [], - "keywords_must": [ - "mysqladmin" - ], + "keywords_must": [], "keywords_forbid": [], "group": 2 } @@ -455,9 +349,7 @@ "pack" ], "children": [], - "keywords_must": [ - "myisampack" - ], + "keywords_must": [], "keywords_forbid": [], "group": 2 } @@ -471,9 +363,7 @@ "二进制日志" ], "children": [], - "keywords_must": [ - "mysqlbinlog" - ], + "keywords_must": [], "keywords_forbid": [], "group": 2 } @@ -483,9 +373,7 @@ "node_id": "mysql-a4998d140f024982989ed4647c78ba65", "keywords": [], "children": [], - "keywords_must": [ - "mysqldump" - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -495,9 +383,7 @@ "node_id": "mysql-d9cdafd993bf41bbb860e5087dd54bd1", "keywords": [], "children": [], - "keywords_must": [ - "mysqlcheck" - ], + "keywords_must": [], "keywords_forbid": [], "group": 2 } @@ -507,9 +393,7 @@ "node_id": "mysql-430b0de67c294d64aff35c85fec8393e", "keywords": [], "children": [], - "keywords_must": [ - "mysqlshow" - ], + "keywords_must": [], "keywords_forbid": [], "group": 2 } @@ -519,9 +403,7 @@ "node_id": "mysql-c5b92946b8824ceea97b20f26946bb76", "keywords": [], "children": [], - "keywords_must": [ - "mysqlpump" - ], + "keywords_must": [], "keywords_forbid": [], "group": 2 } @@ -536,9 +418,7 @@ "导入" ], "children": [], - "keywords_must": [ - "mysqlimport" - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -546,7 +426,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } } ], @@ -579,14 +459,13 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "用户" - ], - [ - "mysql", - "权限" - ] + "role", + "login", + "user", + "用户", + "角色", + "权限", + "privilege" ], "keywords_forbid": [], "group": 1 @@ -601,10 +480,8 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "表" - ] + "表", + "table" ], "keywords_forbid": [], "group": 1 @@ -617,32 +494,21 @@ "view" ], "children": [], - "keywords_must": [ - [ - "mysql", - "视图" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } }, { "存储过程和函数": { - "node_id": "mysql-38fbee06f03c4265903345cae13996c1", + "node_id": "mysql-98e926730d844f238dc9cd8ac5f65126", "keywords": [ "produce", "function" ], "children": [], "keywords_must": [], - "keywords_forbid": [ - [ - "mysql", - "存储过程", - "函数" - ] - ], + "keywords_forbid": [], "group": 0 } }, @@ -657,11 +523,10 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "索引", - "约束" - ] + "索引", + " 约束", + "constraints", + "index" ], "keywords_forbid": [], "group": 1 @@ -676,10 +541,8 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "触发器" - ] + "trigger", + "触发器" ], "keywords_forbid": [], "group": 1 @@ -694,12 +557,7 @@ "myisam" ], "children": [], - "keywords_must": [ - [ - "mysql", - "存储引擎" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -707,7 +565,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -723,12 +581,7 @@ "别名" ], "children": [], - "keywords_must": [ - [ - "mysql", - "别名" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -738,12 +591,7 @@ "node_id": "mysql-2296dbe96d584a52bd28a3ad5f655518", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "between" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -757,12 +605,7 @@ "透视表" ], "children": [], - "keywords_must": [ - [ - "mysql", - "case" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -774,12 +617,7 @@ "distinct" ], "children": [], - "keywords_must": [ - [ - "mysql", - "distinct" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -789,12 +627,7 @@ "node_id": "mysql-fa20a81805b44975aed265dd058c542a", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "order by" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -806,12 +639,7 @@ "union" ], "children": [], - "keywords_must": [ - [ - "mysql", - "union" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -824,12 +652,7 @@ "regular" ], "children": [], - "keywords_must": [ - [ - "mysql", - "正则表达式" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -844,10 +667,9 @@ ], "children": [], "keywords_must": [ - [ - "mysql", - "分页" - ] + "分页", + "limit", + "offset" ], "keywords_forbid": [], "group": 1 @@ -856,7 +678,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -872,16 +694,7 @@ "node_id": "mysql-ac3c072bc54749bdb82324f2b203890d", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "计数" - ], - [ - "mysql", - "count" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -894,16 +707,7 @@ "求和" ], "children": [], - "keywords_must": [ - [ - "mysql", - "求和" - ], - [ - "mysql", - "sum" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -913,16 +717,7 @@ "node_id": "mysql-c1652108441c424197c0c3c526e4831c", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "最小值" - ], - [ - "mysql", - "min" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -932,16 +727,7 @@ "node_id": "mysql-77042376726743bea5c97e82a67a2016", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "最大值" - ], - [ - "mysql", - "max" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -951,16 +737,7 @@ "node_id": "mysql-11462fccf9d24d17a372d5c60af90f54", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "平均值" - ], - [ - "mysql", - "avg" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -970,12 +747,7 @@ "node_id": "mysql-3b85e53dd88146798d21b7254ad85cae", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "having" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -985,20 +757,19 @@ "node_id": "mysql-91829d4938034ce09e99badf23dbebf6", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "WITH ROLLUP" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } } ], - "keywords_must": [], + "keywords_must": [ + "group by", + "分组", + "聚合" + ], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -1014,12 +785,7 @@ "node_id": "mysql-73bfbd883511436c85130b71fa108038", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "inner join" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1029,12 +795,7 @@ "node_id": "mysql-d7a8869fb798498c839c913ce930015d", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "left join" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1044,12 +805,7 @@ "node_id": "mysql-7c2331eea3e84eef9464ad4d7c03e2de", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "right join" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1059,12 +815,7 @@ "node_id": "mysql-fd27af20b046463eac7b2712885ac018", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "cross join" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1074,12 +825,7 @@ "node_id": "mysql-a4773004e0cf432aa7ccdf6b9490838f", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "复杂连接" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -1090,7 +836,7 @@ "连接查询" ], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -1103,13 +849,7 @@ "node_id": "mysql-bf629829370d405cbfcd5aa83adb536a", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "索引", - "入门" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1119,13 +859,7 @@ "node_id": "mysql-fe65d5c615ad40f8ac056cc654f2d788", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "创建", - "索引" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1135,13 +869,7 @@ "node_id": "mysql-85ba0df78d754b00b30aa8e74ad35d06", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "删除", - "索引" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1149,7 +877,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -1165,12 +893,7 @@ "node_id": "mysql-f045eeff32bd449c83afc76abdd65344", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "相关子查询" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 1 } @@ -1184,12 +907,7 @@ "any" ], "children": [], - "keywords_must": [ - [ - "mysql", - "any" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1199,12 +917,7 @@ "node_id": "mysql-87c2d9bc921643aabfd1b12b964ef557", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "all" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1214,15 +927,8 @@ "node_id": "mysql-6c6789b86f714acaa76467fdf9623191", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "exists" - ] - ], - "keywords_forbid": [ - "not exists" - ], + "keywords_must": [], + "keywords_forbid": [], "group": 0 } }, @@ -1231,12 +937,7 @@ "node_id": "mysql-19bc57db42bd4615ba4f123745289407", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "not exists" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1246,15 +947,8 @@ "node_id": "mysql-8436069c855c4f1ead7cf11a026e004b", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "in" - ] - ], - "keywords_forbid": [ - "not in" - ], + "keywords_must": [], + "keywords_forbid": [], "group": 0 } }, @@ -1263,12 +957,7 @@ "node_id": "mysql-06525286a9d4488d94e85b6bd36e3c1e", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "not in" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1281,12 +970,7 @@ "列子查询" ], "children": [], - "keywords_must": [ - [ - "mysql", - "列子查询" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1297,7 +981,7 @@ "subquery" ], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -1310,13 +994,7 @@ "node_id": "mysql-95a29a6a448849029d548393bbdf283e", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "视图", - "概念" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1328,13 +1006,7 @@ "create view" ], "children": [], - "keywords_must": [ - [ - "mysql", - "创建", - "视图" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1344,13 +1016,7 @@ "node_id": "mysql-3a51b0740b704d92a534335a7a8dfd6e", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "修改", - "视图" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1360,13 +1026,7 @@ "node_id": "mysql-36171582b8324dc98ff16d9b0cac406d", "keywords": [], "children": [], - "keywords_must": [ - [ - "mysql", - "删除", - "视图" - ] - ], + "keywords_must": [], "keywords_forbid": [], "group": 0 } @@ -1374,7 +1034,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 1 + "group": 0 } }, { @@ -1455,7 +1115,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -1496,7 +1156,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -1549,7 +1209,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -1646,7 +1306,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -1762,7 +1422,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } } ], @@ -1954,7 +1614,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2024,7 +1684,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2155,7 +1815,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2244,7 +1904,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2292,16 +1952,6 @@ "group": 0 } }, - { - "清理重复索引和冗余索引": { - "node_id": "mysql-06bc5338054a40fc90b24333ee2b9125", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, { "增加中间表": { "node_id": "mysql-a2ddae1b044149ecbb74db3b6eb32721", @@ -2358,7 +2008,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2484,7 +2134,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2603,7 +2253,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2634,7 +2284,7 @@ ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } }, { @@ -2642,26 +2292,6 @@ "node_id": "mysql-3aa068fd95ea4f3bac2c5fa8d6ec0951", "keywords": [], "children": [ - { - "硬件配置": { - "node_id": "mysql-f2a76883814745b9979541ed4117754f", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, - { - "系统内核": { - "node_id": "mysql-4a1bb52626b04dabac78af8eafea868e", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, { "配置项优化": { "node_id": "mysql-6d4f4d7aecfb4546a8163256859562e1", @@ -2691,89 +2321,11 @@ "keywords_forbid": [], "group": 0 } - }, - { - "资源组": { - "node_id": "mysql-715cc1f656df4b099d952145a53dd006", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - } - ], - "keywords_must": [], - "keywords_forbid": [], - "group": 2 - } - }, - { - "应用程序优化": { - "node_id": "mysql-288d4606c1ae4f49a0ab79212bc0ff2b", - "keywords": [], - "children": [ - { - "复用数据库连接": { - "node_id": "mysql-769c096b229842239e2ba2f8d1c768d3", - "keywords": [ - "连接复用", - "连接池" - ], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, - { - "减少数据访问": { - "node_id": "mysql-d7b339f2b2434e3fbd3721b7cd1abc1a", - "keywords": [ - "performance", - "application", - "io" - ], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, - { - "开启查询缓存": { - "node_id": "mysql-8973ee6a0cb045b7bcf623b4e5757baa", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, - { - "使用外部缓存": { - "node_id": "mysql-7f86d4e58a514a44bce09a19595f9cab", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } - }, - { - "分布式 MySQL 架构": { - "node_id": "mysql-402ec368b74f4c33b33c812e9f762d3a", - "keywords": [], - "children": [], - "keywords_must": [], - "keywords_forbid": [], - "group": 0 - } } ], "keywords_must": [], "keywords_forbid": [], - "group": 2 + "group": 0 } } ],