MySQL中的语法格式

MySQL语法格式如下：

1. 创建数据库

CREATE DATABASE dbname;

2. 使用数据库

USE dbname;

3. 创建表

CREATE TABLE table_name (
column1 datatype,
column2 datatype,
...
);

4. 插入数据

INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...);

5. 更新数据

UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;

6. 删除数据

DELETE FROM table_name WHERE condition;

7. 查询数据

SELECT column1, column2, ... FROM table_name WHERE condition;

8. 连接查询

SELECT column1, column2, ... FROM table1 INNER JOIN table2 ON condition;

9. 分组查询

SELECT column1, column2, ... FROM table_name GROUP BY column1;

10. 排序查询

SELECT column1, column2, ... FROM table_name ORDER BY column1 DESC;

11. 子查询

SELECT column1, column2, ... FROM table_name WHERE column1 IN (SELECT column1 FROM table2 WHERE condition);

12. 聚合函数

SELECT COUNT(column1), SUM(column2), AVG(column3) FROM table_name;

13. 视图

CREATE VIEW view_name AS SELECT column1, column2, ... FROM table_name WHERE condition;

14. 存储过程

CREATE PROCEDURE proc_name (parameters)
BEGIN
-- procedure body
END;

15. 触发器

CREATE TRIGGER trigger_name BEFORE INSERT ON table_name FOR EACH ROW
BEGIN
-- trigger body
END;