abstract：插入数据：关键字 INSERT INTO INSERT INTO `merge` VALUES( NULL, '天下定时', '一本道', '13455667788', '日本', '波多野结衣', '15687699988'
插入数据：关键字 INSERT INTO INSERT INTO `merge` VALUES( NULL, '天下定时', '一本道', '13455667788', '日本', '波多野结衣', '15687699988', '日本', '1987-08-12', 98, 165, '2019-04-08' ) 更新数据： UPDATE UPDATE `merge` SET user_name = '剥夺上的', user_phone = '15576859876', user_country = '中国', weight = 99, height = 167 WHERE video_id = 2; 删除数据：DELETE DELETE FROM `merge` WHERE `video_id` = 2; 查询数据：SELECT SELECT * FROM `merge`;
Correcting teacher：天蓬老师Correction time：2019-04-09 11:30:37
Teacher's summary：你的多表关系呢, 没看到对应的语句呢