Question

I just have one probably really dumb problem but I can’t solve this.

I currently have 3 tables:

PROJECT    
PROJECT_CATEGORY     
CATEGORY

Now PROJECT_CATEGORY is an intermediate table so it contains only primary key from PROJECT and CATEGORY like pID and cID.

I know how I can write a query if I have a pID in table CATEGORY but in this case I only have intermediate table. So how I can create a query that will check these 3 tables and then it will show me all categories and which projects they’re assigned to?

Answer 1

select c.*, p.* 
from categories c
inner join PROJECT_CATEGORY pc on pc.category_id = c.id
inner join projects p on pc.project_id = p.id