請注意版本為mysql8.0
創建用戶
方式一
create user zephyr identified by '123123';
方式二
create user zephyr@localhost identified by '123123'
用戶信息可以在mysql.user表中查詢，例如
select user, host
from mysql.user;
效果：
注意：若不在創建用戶時指定host，則默認host為%。
授予訪問權限
授予zephyr訪問數據庫jdbc_learning的權限
grant select, insert, delete, update on jdbc_learning.* to zephyr@localhost;
注意：若host為%，則上述語句可改寫為：
grant select, insert, delete, update on jdbc_learning.* to zephyr;
省略了@localhost，因為%指代所有host
注意：mysql8.0不支持以下寫法：
grant select,insert,delete,update on jdbc_learning.* to zephyr@localhost identified by '123123';
會報錯：
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'identified by '123123'' at line 1