MySql增加用户、授权、修改密码等语句

千家信息网最后更新 2025年11月24日MySql增加用户、授权、修改密码等语句MySql增加用户、授权、修改密码等语句


数据库top_develop
登录数据库
1：新增用户
[mysql@lcamdb ~]$ mysql -u root -p
Enter password: *****
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.


mysql>use mysql


mysql> insert into mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_subject) values("localhost","top_hdz",password("top_hdz"),'','','');
Query OK, 1 row affected (0.00 sec)


mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)


mysql> SELECT host, user, password FROM user WHERE user = "top_hdz";
+-----------+---------+-------------------------------------------+
| host | user | password |
+-----------+---------+-------------------------------------------+
| localhost | top_hdz | *9E2182EFC0FDC01E6EDC9FE113C4158587B31889 |
+-----------+---------+-------------------------------------------+
1 row in set (0.00 sec)


进行登录测试
[mysql@lcamdb mysql]$ mysql -u top_hdz -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 35
Server version: 5.6.17 Source distribution


Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.


Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.


Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.


mysql> use top_develop
ERROR 1044 (42000): Access denied for user 'top_hdz'@'localhost' to database 'top_develop'




2：进行授权，访问top_develop 数据库所有对象的权限
grant all privileges on top_develop.* to top_hdz@localhost identified by 'top_hdz';
Query OK, 0 rows affected (0.00 sec)


mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)


权限添加之后：
mysql> use top_develop
ERROR 1044 (42000): Access denied for user 'top_hdz'@'localhost' to database 'top_develop'
mysql> use top_develop
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A


Database changed
mysql> exit
Bye
如果想指定部分权限给一用户，可以这样来写:
mysql>grant select,update on top_develop.*


3.删除用户。
@>mysql -u root -p
@>密码
mysql>Delete FROM user Where User="top_hdz" and Host="localhost";
mysql>flush privileges;
//删除用户的数据库
mysql>drop database top_develop;
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="top_hdz" 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;