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HomeDatabaseMysql TutorialMySQL添加用户、删除用户与授权的方法

MySql中添加用户,新建数据库,用户授权,删除用户,修改密码(注意每行后边都跟个;表示一个命令语句结束):

1.新建用户

  1.1 登录MYSQL:

  @>mysql -u root -p

  @>密码

  1.2 创建用户:

  mysql> insert into mysql.user(Host,User,Password) values("localhost","test",password("1234"));

  这样就创建了一个名为:test 密码为:1234 的用户。

  注意:此处的"localhost",是指该用户只能在本地登录,不能在另外一台机器上远程登录。如果想远程登录的话,将"localhost"改为"%",表示在任何一台电脑上都可以登录。也可以指定某台机器可以远程登录。

  1.3 然后登录一下:

  mysql>exit;

  @>mysql -u test -p

  @>输入密码

  mysql>登录成功

2.为用户授权

  授权格式:grant 权限 on 数据库.* to 用户名@登录主机 identified by "密码"; 

  2.1 登录MYSQL(有ROOT权限),这里以ROOT身份登录:

  @>mysql -u root -p

  @>密码

  2.2 首先为用户创建一个数据库(testDB):

  mysql>create database testDB;

  2.3 授权test用户拥有testDB数据库的所有权限(某个数据库的所有权限):

   mysql>grant all privileges on testDB.* to test@localhost identified by '1234';

   mysql>flush privileges;//刷新系统权限表

  格式:grant 权限 on 数据库.* to 用户名@登录主机 identified by "密码"; 

  2.4 如果想指定部分权限给一用户,可以这样来写:

  mysql>grant select,update on testDB.* to test@localhost identified by '1234';

  mysql>flush privileges; //刷新系统权限表

  2.5 授权test用户拥有所有数据库的某些权限:   

  mysql>grant select,delete,update,create,drop on *.* to test@"%" identified by "1234";

     //test用户对所有数据库都有select,delete,update,create,drop 权限。

  //@"%" 表示对所有非本地主机授权,不包括localhost。(localhost地址设为127.0.0.1,如果设为真实的本地地址,不知道是否可以,没有验证。)

 //对localhost授权:加上一句grant all privileges on testDB.* to test@localhost identified by '1234';即可。

3. 删除用户

   @>mysql -u root -p

  @>密码

   mysql>Delete FROM user Where User='test' and Host='localhost';

   mysql>flush privileges;

   mysql>drop database testDB; //删除用户的数据库

删除账户及权限:>drop user 用户名@'%';

        >drop user 用户名@ localhost; 

4. 修改指定用户密码

    @>mysql -u root -p

    @>密码

    mysql>update mysql.user set password=password('新密码') where User="test" and Host="localhost";

    mysql>flush privileges;

5. 列出所有数据库

  mysql>show database;

6. 切换数据库

  mysql>use '数据库名';

7. 列出所有表

  mysql>show tables;

8. 显示数据表结构

  mysql>describe 表名;

9. 删除数据库和数据表

  mysql>drop database 数据库名;

  mysql>drop table 数据表名;

更多相关教程请访问 MySQL视频教程

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