mysql语句大全及用法

以下是MySQL语句大全及用法：

1. 创建数据库

CREATE DATABASE database_name;

2. 删除数据库

DROP DATABASE database_name;

3. 创建表

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

4. 删除表

DROP TABLE table_name;

5. 插入数据

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

6. 更新数据

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

7. 删除数据

DELETE FROM table_name WHERE condition;

8. 查询数据

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

9. 去除重复数据

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

10. 排序数据

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

11. 分组数据

SELECT column1, COUNT(column2)
FROM table_name
GROUP BY column1;

12. 连接表

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

13. 子查询

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

14. 修改表结构

ALTER TABLE table_name ADD column_name datatype;

15. 添加索引

CREATE INDEX index_name ON table_name (column_name);

以上是MySQL语句的基本用法，还有很多高级用法需要进一步学习和掌握。