all

data/2.MySQL中阶/6.子查询/2. ANY/any.json

+{
+  "type": "code_options",
+  "author": "ccat",
+  "source": "any.md",
+  "notebook_enable": false,
+  "exercise_id": "3eaab3e2a9cd45e2ab238e6943609861"
+}
\ No newline at end of file

data/2.MySQL中阶/6.子查询/2. ANY/any.md

+# ANY
+
+Joe 想要从员工表
+
+```mysql
+create table employee(
+    id int primary key auto_increment,
+    name varchar(256),
+    dept varchar(256),
+    salary decimal(12, 4)
+);
+```
+
+构造一个员工列表，排除每个部门最高工资的员工。这个查询可以怎样写？
+
+## 答案
+
+```mysql
+select id, name, dept, salary
+from employee as o
+where o.salary < any(select salary from employee as i where i.dept=o.dept)
+```
+
+## 选项
+
+### A
+
+```mysql
+select id, name, dept, salary
+from employee as o
+join employee as i on o.dept = i.dept and o.salary < i.salary
+```
+
+### B
+
+```mysql
+select o.id, o.name, o.dept, o.salary
+from employee as o
+left join employee as i on o.dept = i.dept and o.salary < i.salary
+where i.id is null;
+```
+
+### C
+
+```mysql
+select o.id, o.name, o.dept, o.salary 
+from employee as o 
+    left join employee as i on o.dept = i.dept and o.salary < i.salary 
+where i.id is not null;
+```
\ No newline at end of file

data/2.MySQL中阶/6.子查询/2. ANY/config.json

 {
   "node_id": "mysql-6bb279fa10fa4633a3af51ff7001f5ce",
-  "keywords": ["subquery", "子查询", "any"],
+  "keywords": [
+    "subquery",
+    "子查询",
+    "any"
+  ],
   "children": [],
-  "export": [],
+  "export": [
+    "any.json"
+  ],
   "keywords_must": [
-    ["mysql", "any"]
+    [
+      "mysql",
+      "any"
+    ]
   ],
   "keywords_forbid": [],
   "group": 0

data/2.MySQL中阶/6.子查询/3.ALL/all.json

+{
+  "type": "code_options",
+  "author": "ccat",
+  "source": "all.md",
+  "notebook_enable": false,
+  "exercise_id": "f2a50fcc0b8d4417a69b956c26eeed7a"
+}
\ No newline at end of file

data/2.MySQL中阶/6.子查询/3.ALL/all.md

+# ALL
+
+Joe 想从员工表
+
+```mysql
+create table employee(
+    id int primary key auto_increment,
+    dept int,
+    name varchar(256),
+    post varchar(16)
+)
+```
+
+中找出所有其所在部门没有助理（post 为 `assistant`）的员工信息。由于 Joe 没有其它表的查询权限，他只能查询员工表，这个查询应该是：
+
+## 答案
+
+```mysql
+select id, name, dept 
+from employee as o
+where 'assistant' != all(select post from employee as i where o.dept = i.dept); 
+```
+
+## 选项
+
+### A
+
+```mysql
+select id, name, dept 
+from employee as o
+where 'assistant' = all(select post from employee as i where o.dept = i.dept); 
+```
+
+### B
+
+```mysql
+select id, name, dept 
+from employee as o
+where 'assistant' != all(select post from employee as i where o.dept = i.dept); 
+```
+
+### C
+```mysql
+select id, name, dept 
+from employee as o
+where 'assistant' != all(select post from employee as i); 
+```
+
+### D
+
+```mysql
+select id, name, dept 
+from employee as o
+where 'assistant' != ANY(select post from employee as i where o.dept = i.dept); 
+```
\ No newline at end of file

data/2.MySQL中阶/6.子查询/3.ALL/config.json

@@ -2,9 +2,14 @@
   "node_id": "mysql-87c2d9bc921643aabfd1b12b964ef557",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": [
+    "all.json"
+  ],
   "keywords_must": [
-    ["mysql", "all"]
+    [
+      "mysql",
+      "all"
+    ]
   ],
   "keywords_forbid": [],
   "group": 0

data/tree.json

@@ -1036,7 +1036,10 @@
                   {
                     " RIGHT JOIN": {
                       "node_id": "mysql-7c2331eea3e84eef9464ad4d7c03e2de",
-                      "keywords": [],
+                      "keywords": [
+                        "right join",
+                        "右连接"
+                      ],
                       "children": [],
                       "keywords_must": [
                         [
@@ -2487,7 +2490,10 @@
                   {
                     " PT-QUERY-DIGEST分析查询": {
                       "node_id": "mysql-626f1ca763b344558b3a5eefdb4885a2",
-                      "keywords": [],
+                      "keywords": [
+                        "pt-query-digest",
+                        "优化"
+                      ],
                       "children": [],
                       "keywords_must": [],
                       "keywords_forbid": [],