Question

我有两张桌子video_details和video_tag。我想获取属于particualr tag id

的video_details数据

这是我的表结构

CREATE TABLE IF NOT EXISTS `video_details` (
  `video_id` int(6) NOT NULL auto_increment COMMENT 'Auto Generated key',
  `video_name` varchar(50) default NULL,
  `video_file` varchar(100) default NULL,
  `how_to_video` varchar(100) default NULL COMMENT 'information video',
  `video_desc` varchar(50) default NULL,
  `video_created_date` timestamp NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
  `video_status` tinyint(1) default NULL COMMENT '0-->video will not be displayed.,1-->video will be displayed ',
  PRIMARY KEY  (`video_id`)
) ENGINE=InnoDB AUTO_INCREMENT=382 DEFAULT CHARSET=utf8;

CREATE TABLE IF NOT EXISTS `video_tag` (
  `video_id` int(6) default NULL,
  `tag_id` int(11) default NULL,
  KEY `FK__tag_details` (`tag_id`),
  KEY `FK__video_details` (`video_id`),
  CONSTRAINT `FK__video_details` FOREIGN KEY (`video_id`) REFERENCES `video_details` (`video_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ;

相应的sql小提琴

http://sqlfiddle.com/#!9/74b210

我试过这种方式

select vt.video_id , vd.video_name from video_tag vt , video_details vd 
where vt.tag_id in (1,2)

Answer 1

只需使用join

即可

SELECT vt.video_id , vd.video_name 
FROM video_tag vt 
LEFT JOIN video_details vd on vd.video_id = vt.video_id
WHERE vt.tag_id in (1,2)

如何使用In Operator获取详细信息

1 个答案: