1.通过mysql数据库的user表查看用户相关信息
mysql> use mysql 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> select host,user,password from user ;+-----------+------+-------------------------------------------+ | host | user | password | +-----------+------+-------------------------------------------+ | localhost | root | *87F2746835A04895BB77E12AA5054A767******* | | qxyw | root | | | 127.0.0.1 | root | | | localhost | | | | qxyw | | | +-----------+------+-------------------------------------------+ 5 rows in set (0.00 sec)
2.创建数据库
mysql> create database [databasename] default character set utf8 collate utf8_general_ci; Query OK, 1 row affected (0.00 sec)
3.创建用户
mysql> create user 'dba'@'%' identified by '*******'; Query OK, 0 rows affected (0.00 sec)
user表中host列的值的意义
% 匹配所有主机
localhost localhost不会被解析成IP地址，直接通过UNIXsocket连接
127.0.0.1 会通过TCP/IP协议连接，并且只能在本机访问；
::1 ::1就是兼容支持ipv6的，表示同ipv4的127.0.0.1
4.对dba用户给予针对指定数据库进行增删改查的权限
mysql> grant select,insert,update,delete,create on [databasename].* to dba; Query OK, 0 rows affected (0.00 sec)
注意：修改完权限以后 一定要刷新服务，或者重启服务，刷新服务用：FLUSH PRIVILEGES
5.可以通过show grants命令查看权限，若想要在原来的基础上增加权限则继续执行grant
mysql> grant drop on [databasename].* to dba; Query OK, 0 rows affected (0.00 sec) mysql> show grants for dba;+----------------------------------------------------------------------------------------------------+ | Grants for dba@% | +----------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'dba'@'%' IDENTIFIED BY PASSWORD '*****************************************' | | GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP ON `[databasename]`.* TO 'dba'@'%' | +----------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec)
6.通过revoke命令可以移除用户的相关权限
mysql> revoke drop on [databasename].* from dba; Query OK, 0 rows affected (0.00 sec) mysql> show grants for dba;+----------------------------------------------------------------------------------------------------+ | Grants for dba@% | +----------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'dba'@'%' IDENTIFIED BY PASSWORD '*****************************************' | | GRANT SELECT, INSERT, UPDATE, DELETE, CREATE ON `[databasename]`.* TO 'dba'@'%' | +----------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec)
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