提数据库内容的MySQL语句
时间: 2024-06-06 17:08:07 浏览: 9
1. 创建数据库
CREATE DATABASE database_name;
2. 删除数据库
DROP DATABASE database_name;
3. 使用数据库
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. 插入数据
INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);
7. 更新数据
UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;
8. 删除数据
DELETE FROM table_name WHERE condition;
9. 查询数据
SELECT column1, column2, ... FROM table_name WHERE condition;
10. 连接表查询
SELECT column1, column2, ... FROM table1 INNER JOIN table2 ON condition;
11. 排序查询
SELECT column1, column2, ... FROM table_name ORDER BY column_name ASC/DESC;
12. 分组查询
SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name;
13. 聚合函数查询
SELECT COUNT(column_name), AVG(column_name), SUM(column_name), MAX(column_name), MIN(column_name) FROM table_name;
14. 嵌套查询
SELECT column_name FROM table_name WHERE column_name IN (SELECT column_name FROM table_name WHERE condition);