exercises review

data/2.MySQL中阶/11.用户和权限/1.创建普通用户/config.json

 {
   "node_id": "mysql-25808aa5b4ba4e78bd3dc59e09b403ed",
-  "keywords": ["create user"],
+  "keywords": [
+    "create user"
+  ],
   "children": [],
   "export": [
     "create_user_desc.json",

data/2.MySQL中阶/11.用户和权限/1.创建普通用户/create_user_desc.json

 {
-    "type": "code_options",
-    "author": "zxm2015",
-    "source": "create_user_desc.md",
-    "notebook_enable": false,
-    "exercise_id": ""
-  }
\ No newline at end of file
+  "type": "code_options",
+  "author": "zxm2015",
+  "source": "create_user_desc.md",
+  "notebook_enable": false,
+  "exercise_id": ""
+}
\ No newline at end of file

data/2.MySQL中阶/11.用户和权限/1.创建普通用户/create_user_desc.md

@@ -11,11 +11,12 @@
 
 ## 答案
 
+使用
 ```
 GRANT SELECT ON *.* TO 'binghe'@'localhost'
 IDENTIFIED BY '@Binghe123456';
-创建用户名为binghe的用户，密码为@binghe123456，并为用户赋予所有数据表全部权限
 ```
+创建用户名为binghe的用户，密码为@binghe123456，并为用户赋予所有数据表全部权限
 
 ## 选项
 

data/2.MySQL中阶/6.连接查询/1.INNER JOIN/inner_join_desc.md

@@ -20,19 +20,19 @@ INNER JOIN连接的其他表越多性能越好
 ### A
 
 ```
-INNER JOIN又称为自连接
+INNER JOIN 又称为内连接
 ```
 
 ### B
 
 ```
-INNER JOIN连接的主表和被连接表都为自己
+INNER JOIN 确保连接结果仅包含与on表达式匹配的记录
 ```
 
 ### C
 
 ```
-INNER JOIN出现在FROM子句之后
+INNER JOIN出现在FROM子句之后，WHERE走之前
 ```
 
 ### D

data/3.MySQL高阶/3.过程化编程/4.WHILE/while.md

@@ -20,9 +20,9 @@ end LOOP trace;
 
 （提示）WHILE语法结构为：
 ```sql
-WHILE search_condition DO
+[label:] WHILE search_condition DO
     statement list
-END WHILE
+END WHILE [label]
 ```
 
 <hr/>