Mysql的基础语法

1. 创建数据库：

CREATE DATABASE database_name;

2. 删除数据库：

DROP DATABASE database_name;

3. 选择数据库：

USE database_name;

4. 创建表：

CREATE TABLE table_name ( column1 datatype, column2 datatype, column3 datatype, ... );

5. 删除表：

DROP TABLE table_name;

6. 修改表：

ALTER TABLE table_name ADD column_name datatype;

7. 插入数据：

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

8. 更新数据：

UPDATE table_name SET column_name = new_value WHERE condition;

9. 删除数据：

DELETE FROM table_name WHERE condition;

10. 查询数据：

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

11. 排序数据：

SELECT column1, column2, ... FROM table_name ORDER BY column_name ASC/DESC;

12. 分组数据：

SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name;

13. 连接数据表：

SELECT column_name FROM table1 LEFT JOIN table2 ON table1.column_name = table2.column_name;

14. 聚合函数：

SELECT COUNT(*) FROM table_name;

15. 子查询：

SELECT column_name FROM table_name WHERE column_name IN (SELECT column_name FROM table_name WHERE condition);