I have 3 tables in MYSQL, VideoCategory is the junction table between Video and category
Video
Category
VideoCategory
it means: each video can bleong to many categories (VideoCategory) table.
My goal is to retrieve a "SMART" way of these values: it means: Video, Comma Delimied String of Categories
ex:
"video1", "1, 2, 3"
"video2", "1, 4"
"video"3", ""
(video 3 has no categories assigned)
Any idea on how to do that without using mysql loops ?
group_concat
and a couple of join
s should do the trick:
SELECT video.name,
GROUP_CONCAT(category.name ORDER BY category.name SEPARATOR ', ')
FROM video v
JOIN videocategory vc ON v.id = videocategory.video_id
JOIN category c ON videocategory.category_id = c.id
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.