mysql创建数据库拥挤及分配权限

#查询数据库所有用户
SELECT USER,host FROM mysql.user
#新建数据库用户
create user 'tianxftest1'@'%' IDENTIFIED by '456123'
#赋予用户角色
revoke all PRIVILEGES on 'pmp_user'.* FROM 'tianxftest1'@'%' IDENTIFIED by '456123'
#删除用户如下
drop user tianxftest1@192.168.222.110 ;
drop user tianxftest1@'%';
#查看用户权限
show grants for tianxftest1;
#授权用户拥有数据库的所有权限
grant all privileges on fe.* to fe_group@localhost identified by '123456
#刷新权限表
flush privileges
#作用到某个数据库的具体某张表
grant select, insert, update, delete on testdb.orders to dba@localhost;
#作用到某张表的具体列上
grant select(id, se, rank) on testdb.apache_log to dba@localhost;
#撤销某个用户的某个权限
revoke all on *.* from dba@localhost;