mysql添加、删除用户及授权、修改密码实例详解

//登录MYSQL
@>mysql -u root -p
@>密码
//创建用户
mysql> mysql> insert into mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_sub
ject) values("localhost","pppadmin",password("passwd"),'','','');
 

mysql>exit;
@>mysql -u jbxue -p
@>输入密码
mysql>登录成功

//登录MYSQL（有ROOT权限）。我里我以ROOT身份登录.
@>mysql -u root -p
@>密码
//首先，创建一个数据库(testdb)
mysql>create database testdb;
//授权jbxue用户拥有jbxue数据库的所有权限。
>grant all privileges on testdb.* to jbxue@localhost identified by '1234';
//刷新系统权限表
mysql>flush privileges;
mysql>其它操作
/*

授权用户指定部分权限:
mysql>grant select,update on testdb.* to jbxue@localhost identified by '1234';
//刷新系统权限表。
mysql>flush privileges;
*/

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

@>mysql -u root -p
@>密码
mysql>update mysql.user set password=password('新密码') where User="jbxue" and Host="localhost";
mysql>flush privileges;

mysql>show database;

mysql>use '数据库名';

mysql>show tables;

mysql>describe 表名;

mysql>drop database 数据库名;
mysql>drop table 数据表名;