数据库的增删改查，授权，表结构修改

mysql> GRANT ALL ON *.* TO 'qzl'@'localhost' IDENTIFIED BY 'Qzl123456!';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> GRANT ALL ON *.* TO 'qzl'@'127.0.0.1' IDENTIFIED BY 'Qzl123456!';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> GRANT ALL ON qzl.* TO 'qzl'@'192.168.70.133' IDENTIFIED BY 'Qzl123456!';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql>  GRANT ALL ON *.* TO 'qzl'@'%' IDENTIFIED BY 'Qzl123456!';
Query OK, 0 rows affected, 1 warning (0.00 sec)