Question

I have two tables:

'people'
    id   |  name    | which_image
  --------------------------------
     1   |  Joey    |  1
     2   |  Bobby   |  2
     3   |  Jimmy   |  3

'images'
    id      |  filename
  --------------------------------
     1      |  joe_face.jpg
     2      |  bob_angry.jpg
     3      |  jim_laughs.jpg

How can I do one select to get all columns in the ‘people’ table for a couple of people, and in the same query, get their filenames? I’ve tried this but it returns an empty set:

SELECT p.*, i.filename FROM people p, images i
 WHERE ( p.id = 1 OR p.id = 3 ) 
   AND p.which_image = i.id

Answer 1

Since there is no real foreign key in ‘images’, use a sub-select as follows:

SELECT p.*, (select filename from images i where i.id=p.which_image) as filename  
FROM people p 
WHERE p.id in (1,3)