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MYSQL Select 5 records from one table based on several different values from another

开发者 https://www.devze.com 2023-01-18 01:12 出处:网络
I am by no means fluent in MYSQL.What I am trying to do is I have a table that has a list of Galleries with unique ID numbers.I have another table ImageData that has images that may be as many as 1000

I am by no means fluent in MYSQL. What I am trying to do is I have a table that has a list of Galleries with unique ID numbers. I have another table ImageData that has images that may be as many as 1000 that are related to each GalleryID that is in the first table. I want to do a select that will get 5 random records from each GalleryID. I am trying to do this without doing a loop and multiple hits to the database.

The tables are as follows Galleries -> GalleryID -> GalleryName

ImageData -> ImageID -> ImageName -> GalleryID

I开发者_运维技巧 hope this makes sense.


Hi Randy welcome to the club. Here is a simple and fast solution to your scenario. Enjoy

select g.GalleryName, i.imageName from Galleries g, imageData i, (SELECT gl.Galleryid from Galleries gl ORDER BY RAND() LIMIT 5) m where m.galleryID = i.galleryID

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