Mysql命令彙總

             flush privileges;

1.修改ROOT密碼：

alter user 'root'@'localhost' identified by '123';

2.取消密碼複雜要求：

set global validate_password_policy=0;

3.查看密碼長度：

select @@validate_password_length;

4.查看mysql當前有哪些用戶:

 SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;

4.1查看用戶權限.

show grants from user;

5.鎖表:

flush tables with read lock;

6.解表:

unlock tables;

7.查看鎖表時間

show variables like '%timeout%';

8.建立用戶方式:

grant all privileges on 庫名.* to admin@'%' identified by '123456'; （受權庫）

CREATE USER 'username'@'host' IDENTIFIED BY 'password'; （單建立用戶）

9.建立主從帳號(在主數據庫建立)

GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%' IDENTIFIED BY 'password';

9.1.主庫查詢當前master的bin-log

show  matser status;

10.從庫鏈接主庫方式: 

CHANGE MASTER TO  

MASTER_HOST='主庫IP', 

MASTER_PORT=3306,

MASTER_USER='repl',  

MASTER_PASSWORD='主庫建立的密碼',  

MASTER_LOG_FILE='mysql-bin.000002',  

MASTER_LOG_POS=154;    

11.啓用mysql帳號遠程鏈接

GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "youpassword" WITH GRANT OPTION; 

12.收回帳號權限

revoke select on dbname.* from username;

revoke all privileges on dbname[.tbname] from username;

privileges包括：    

alter：修改數據庫的表     

create：建立新的數據庫或表     

delete：刪除表數據     

drop：刪除數據庫/表     

index：建立/刪除索引     

insert：添加表數據     

select：查詢表數據     

update：更新表數據     

all：容許任何操做     

usage：只容許登陸

13. 建立mysql庫

create database mobile DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

14.刪除用戶

 DROP USER 'username'@'host';

15.刪除庫:

drop database dbname;