13.7.1 Account Management Statements

1. 修改密码
   

   #下次连接使用新密码；
   ALTER USER 'jeffrey'@'localhost'
     IDENTIFIED BY 'new_password' PASSWORD EXPIRE;
   #指定验证插件并设置密码和有效期；
   ALTER USER 'jeffrey'@'localhost'
     IDENTIFIED WITH sha256_password BY 'new_password'
     PASSWORD EXPIRE INTERVAL 180 DAY;
   #锁定用户
   ALTER USER 'jeffrey'@'localhost' ACCOUNT LOCK;
   ALTER USER 'jeffrey'@'localhost' ACCOUNT UNLOCK;
   #限制连接次数和连接方式
   ALTER USER 'jeffrey'@'localhost'
     REQUIRE SSL WITH MAX_CONNECTIONS_PER_HOUR 20;
   #指定明文密码
   ALTER USER 'jeffrey'@'localhost'
     IDENTIFIED BY 'password';
   #能加密就加密，不能加密也行
   ALTER USER 'jeffrey'@'localhost' REQUIRE NONE;
   #要求加密连接
   ALTER USER 'jeffrey'@'localhost' REQUIRE SSL;
   #要求证书加密，无需指定ssl选项
   ALTER USER 'jeffrey'@'localhost' REQUIRE X509;
   #立即过期
   ALTER USER 'jeffrey'@'localhost' PASSWORD EXPIRE;
   #密码永不过期
   ALTER USER 'jeffrey'@'localhost' PASSWORD EXPIRE NEVER;
   #指定过期时间
   ALTER USER 'jeffrey'@'localhost' PASSWORD EXPIRE INTERVAL 180 DAY;

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