MYSQL用户和权限的相关操作

注意:用户操作通常在root用户下进行. 同时在grant语句中的语句' identified by '***'' 可以省略. 如:

mysql> grant all privileges on *.* to 'jerval2'@'localhost';
Query OK, 0 rows affected (0.01 sec)

授权命令GRANT 语句的语法如下：

GRANT privileges (columns) 
ON what 
TO user 
IDENTIFIED BY 'password' 
WITH GRANT OPTION

其中IDENTIFIED BY 'password'语句在root用户下可以省略(其它用户下没有测试),

>>新建用户

新建用户jerval2,仅本地访问,密码为123:

mysql> insert into mysql.user(host,user,password) values('localhost','jerval2',password('123'));
Query OK, 1 row affected, 3 warnings (0.00 sec)

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

>>修改用户密码为123456.

mysql> update mysql.user set password=password('123456') where user='jerval2' and host='localhost';
Query OK, 1 row affected (0.02 sec)
Rows matched: 1  Changed: 1  Warnings: 0

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

>>为用户指定数据库访问资源

a,授权用户jerval2在mysql库下的所有表的所有操作权限.

mysql> grant all privileges on mysql.* to 'jerval2'@'localhost' identified by '123';
Query OK, 0 rows affected (0.00 sec)

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

b,授权用户jerval2在mysql库下的所有表的select,insert,update,delete操作权限.

mysql> grant select,insert,update,delete on mysql.* to 'jerval2'@'localhost' identified by '123';
Query OK, 0 rows affected (0.00 sec)

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

>>删除用户

mysql> delete from mysql.user where user='jerval2' and host='localhost';
Query OK, 1 row affected (0.00 sec)

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

 

收藏自网络:

权限信息用user、db、host、tables_priv和columns_priv表被存储在mysql数据库中(即在名为mysql的数据库中)。 

权限 列 Context 
select Select_priv 表 
insert Insert_priv 表 
update Update_priv 表 
delete Delete_priv 表 
index Index_priv 表 
alter Alter_priv 表 
create Create_priv 数据库、表或索引 
drop Drop_priv 数据库或表 
grant Grant_priv 数据库或表 
references References_priv 数据库或表 
reload Reload_priv 服务器管理 
shutdown Shutdown_priv 服务器管理 
process Process_priv 服务器管理 
file File_priv 在服务器上的文件存取