恩如何获得每个视频的所有子类别中的MySQL

Question

我有这3个表：

CREATE TABLE `subcategories` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `name` varchar(45) DEFAULT NULL, 
    `categories_id` int(11) NOT NULL, 
    PRIMARY KEY (`id`), 
    KEY `fk_subcategories_categories1_idx` (`categories_id`), 
    CONSTRAINT `fk_subcategories_categories1` FOREIGN KEY (`categories_id`) REFERENCES `categories` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION 
) ENGINE=InnoDB AUTO_INCREMENT=71 DEFAULT CHARSET=utf8; 

CREATE TABLE `videos` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `brightcove_id` varchar(45) DEFAULT NULL, 
    `video_stillUrl` text, 
    `video_thumbnailURL` text, 
    `video_playsTotal` varchar(45) DEFAULT NULL, 
    `establishments_id` int(11) NOT NULL, 
    PRIMARY KEY (`id`), 
    KEY `fk_videos_establishments1_idx` (`establishments_id`), 
    CONSTRAINT `fk_videos_establishments1` FOREIGN KEY (`establishments_id`) REFERENCES `establishments` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION 
) ENGINE=InnoDB AUTO_INCREMENT=220 DEFAULT CHARSET=utf8; 

CREATE TABLE `subcategories_videos` (
    `subcategories_id` int(11) NOT NULL, 
    `videos_id` int(11) NOT NULL, 
    PRIMARY KEY (`subcategories_id`,`videos_id`), 
    KEY `fk_subcategories_videos_subcategories1_idx` (`subcategories_id`), 
    KEY `fk_subcategories_videos_videos1_idx` (`videos_id`), 
    CONSTRAINT `fk_subcategories_videos_subcategories1` FOREIGN KEY (`subcategories_id`) REFERENCES `subcategories` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION, 
    CONSTRAINT `fk_subcategories_videos_videos1` FOREIGN KEY (`videos_id`) REFERENCES `videos` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION 
) ENGINE=InnoDB DEFAULT CHARSET=utf8; 

，我想知道，我怎么会碰到一些在确定的子类别中的影片，例如：

select * from subcategories_videos where subcategories_id in(62,61); 

在这里我得到的带有编号62和61，但类别对应的所有影片我怎样才能得到一个视频是在两个子类别，像这样：

select * from subcategories_videos where videos_id=193 

这里它将通过视频ID获取子类别，但我如何才能对所有记录执行此操作？非常感谢！

Answer 1

您可以使用基和具有

select videos_id from subcategories_videos 
    where subcategories_id in(62,61) 
    Group by videos_id 
    Having count(*) = 2