mysql命令语句大全(常用的MySQL命令语句)

MySQL是一个广泛使用的关系型数据库管理系统，它使用SQL（结构化查询语言）作为查询和操作数据的主要方式。

以下是一些常用的MySQL命令语句

数据库操作

创建数据库

CREATE DATABASE database_name;
CREATE DATABASE database_name;
CREATE DATABASE database_name;

删除数据库

DROP DATABASE database_name;
DROP DATABASE database_name;
DROP DATABASE database_name;

显示所有数据库

SHOW DATABASES;
SHOW DATABASES;
SHOW DATABASES;

选择要操作的数据库

USE database_name;
USE database_name;
USE database_name;

表操作

创建表

CREATE TABLE table_name (
  column1 datatype PRIMARY KEY,
  column2 datatype NOT NULL,
  column3 datatype DEFAULT value,
  ...
);
CREATE TABLE table_name (
  column1 datatype PRIMARY KEY,
  column2 datatype NOT NULL,
  column3 datatype DEFAULT value,
  ...
);
CREATE TABLE table_name (
  column1 datatype PRIMARY KEY,
  column2 datatype NOT NULL,
  column3 datatype DEFAULT value,
  ...
);

删除表

DROP TABLE table_name;
DROP TABLE table_name;
DROP TABLE table_name;

显示当前数据库中的所有表

SHOW TABLES;
SHOW TABLES;
SHOW TABLES;

显示表的结构

DESCRIBE table_name;
DESCRIBE table_name;
DESCRIBE table_name;

重命名表

ALTER TABLE table_name RENAME TO new_table_name;
ALTER TABLE table_name RENAME TO new_table_name;
ALTER TABLE table_name RENAME TO new_table_name;

添加列

ALTER TABLE table_name ADD COLUMN column_name datatype;
ALTER TABLE table_name ADD COLUMN column_name datatype;
ALTER TABLE table_name ADD COLUMN column_name datatype;

删除列

ALTER TABLE table_name DROP COLUMN column_name;
ALTER TABLE table_name DROP COLUMN column_name;
ALTER TABLE table_name DROP COLUMN column_name;

修改列类型或属性

ALTER TABLE table_name MODIFY COLUMN column_name datatype;
ALTER TABLE table_name MODIFY COLUMN column_name datatype;
ALTER TABLE table_name MODIFY COLUMN column_name datatype;

数据操作

插入数据

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

更新数据

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

删除数据

DELETE FROM table_name WHERE condition;
DELETE FROM table_name WHERE condition;
DELETE FROM table_name WHERE condition;

查询数据

SELECT column1, column2, ...
FROM table_name
WHERE condition
GROUP BY column
HAVING condition
ORDER BY column ASC|DESC
LIMIT offset, count;
SELECT column1, column2, ...
FROM table_name
WHERE condition
GROUP BY column
HAVING condition
ORDER BY column ASC|DESC
LIMIT offset, count;
SELECT column1, column2, ...
FROM table_name
WHERE condition
GROUP BY column
HAVING condition
ORDER BY column ASC|DESC
LIMIT offset, count;

连接查询（INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN等）

SELECT ...
FROM table1
JOIN table2 ON table1.column = table2.column
WHERE condition
ORDER BY column ASC|DESC
LIMIT offset, count;
SELECT ...
FROM table1
JOIN table2 ON table1.column = table2.column
WHERE condition
ORDER BY column ASC|DESC
LIMIT offset, count;
SELECT ...
FROM table1
JOIN table2 ON table1.column = table2.column
WHERE condition
ORDER BY column ASC|DESC
LIMIT offset, count;

子查询

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

索引操作

创建索引

CREATE INDEX index_name ON table_name (column1, column2, ...);
CREATE INDEX index_name ON table_name (column1, column2, ...);
CREATE INDEX index_name ON table_name (column1, column2, ...);

删除索引

DROP INDEX index_name ON table_name;
DROP INDEX index_name ON table_name;
DROP INDEX index_name ON table_name;

用户和权限操作

创建用户

CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';
CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';
CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';

授权用户

GRANT ALL PRIVILEGES ON database_name.* TO 'username'@'localhost';
GRANT ALL PRIVILEGES ON database_name.* TO 'username'@'localhost';
GRANT ALL PRIVILEGES ON database_name.* TO 'username'@'localhost';

撤销用户权

REVOKE ALL PRIVILEGES ON database_name.* FROM 'username'@'localhost';
REVOKE ALL PRIVILEGES ON database_name.* FROM 'username'@'localhost';
REVOKE ALL PRIVILEGES ON database_name.* FROM 'username'@'localhost';

删除用户

DROP USER 'username'@'localhost';
DROP USER 'username'@'localhost';
DROP USER 'username'@'localhost';

刷新权限

FLUSH PRIVILEGES;
FLUSH PRIVILEGES;
FLUSH PRIVILEGES;

以上是MySQL常用的一些命令，希望这些命令能帮助到您。