MySQL5.5中
mysql> grant all on *.* to oldboy@'%' identified by '123456' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)用户：oldboy@'%'，远程和本地都可以登录MySQL
MySQL5.6中mysql> grant all on *.* to oldboy@'%' identified by '123456' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)用户：oldboy@'%'，远程可以登录MySQL，但是本地登录就会报错，报错如下：[root@szxsfb02-db-56 3306]# mysql -uoldboy -p123456 -S /data/3306/mysql.sock
Warning: Using a password on the command line interface can be insecure.
ERROR 1045 (28000): Access denied for user 'oldboy'@'localhost' (using password: YES)要想本地登录必须本地授权
mysql> grant all on *.* to oldboy@localhost identified by '123456' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)然后再本地登录即可
[root@szxsfb02-db-56 3306]# mysql -uoldboy -p123456 -S /data/3306/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 20
Server version: 5.6.34 Source distribution
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