Question

I’ve got three tables, two are “data” tables, one is a join (or lookup) table.

Place Table

• PlaceId
• Name
• etc…

Categories Table

• CatId
• Name
• etc…

PlaceCats Table

• PlaceId
• CatId

(with appropriate relationships defined between each Id field)

What I want to do is pull the categories that contain less than 5 Places… for some reason I just can wrap my mind around the T-SQL to make that happen.

Answer 1

SELECT * 
FROM Categories 
WHERE CatId IN 
(
    SELECT CatId  
    FROM PlaceCats
    GROUP BY CatId
    HAVING COUNT(*) < 5
)