Question

I’m not sure whether I have to make a pivot table or some sub-queries to get the desired result, but this is the table I have:

asset_id    id       title           title_type
34           1       episode 1       5
34           2       TNS             4
34           3       WXPR            3
35           4       episode 57      5
35           5       BLSH            4
35           6       WXRE            3
36           7       episode 56      5
36           8       BLSH            4
36           9       WXRE            3

But this is what I want. Each title_type in it’s own column and WHERE title with title_type 4 = BLSH. So like this:

asset id       title_type 5     title_type 4    title_type 3 
35             episode 56       BLSH            WXRE
36             episode 57       BLSH            WXRE

Answer 1

The real fix of course is to change your database structure 😉

However, you may use JOINs to get the desired data. In my example there is no subselect involved:

SELECT 
  o.asset_id, 
  /* select the data from the self-joins */
  `5`.title AS title_type_5,
  `4`.title AS title_type_4,
  `3`.title AS title_type_3
FROM 
  foo o
/* use self-joins to combine data of multiple rows in a single row */
LEFT JOIN foo `3` ON `3`.title_type = 3 AND `3`.asset_id = o.asset_id
LEFT JOIN foo `4` ON `4`.title_type = 4 AND `4`.asset_id = o.asset_id
LEFT JOIN foo `5` ON `5`.title_type = 5 AND `5`.asset_id = o.asset_id
WHERE 
  o.title_type = "4" 
  AND o.title = "BLSH"

Try my example on SQLfiddle