權限管理
    1、創建賬號
        # 本地賬號
        create user ‘egon1‘@‘localhost‘ identified by ‘123‘; # mysql -uegon1 -p123
        # 遠程帳號
        create user ‘egon2‘@‘192.168.31.10‘ identified by ‘123‘; # mysql -uegon2 -p123 -h 服務端ip
        create user ‘egon3‘@‘192.168.31.%‘ identified by ‘123‘; #
 
 mysql -uegon3 -p123 -h 服務端ip
        create user ‘egon3‘@‘%‘ identified by ‘123‘; # mysql -uegon3 -p123 -h 服務端ip
        
    2、授權
　　　　權限控制力度依次降低
        user:*.*
        db:db1.*
        tables_priv:db1.t1
        columns_priv:id,name
        
　　　　　# 庫級別
        grant all on *.* to ‘egon1‘@‘
 
localhost‘;          # 授權grant     *.* 授權所有級別
        grant select on *.* to ‘egon1‘@‘localhost‘;
        revoke select on *.* from ‘egon1‘@‘localhost‘;    # 回收權限revoke
        
　　　　　授權庫　
        grant select on db1.* to ‘egon1‘@‘localhost‘;
        revoke select on db1.* from ‘egon1‘@‘localhost
 
‘;
        
        授權表
        grant select on db1.t2 to ‘egon1‘@‘localhost‘;
        revoke select on db1.t2 from ‘egon1‘@‘localhost‘; # 回收權限

        授權表下的字段
        grant select(id,name),update(age) on db1.t2 to ‘egon1‘@‘localhost‘;

select * from t2 ,,, * 代表所有

10 MySQL--權限管理