+------+------+------------+-------------+
| id   | lang | contentUrl | contentType |
+------+------+------------+-------------+
| CON1 | en   | test/path  | hls         |
| CON1 | en   | test/path  | mp4         |
| CON3 | en   | test/path  | mp4         |
| CON3 | fr   | test/path  | mp4         |
| CON2 | en   | test/path  | mp4         |
+------+------+------------+-------------+
5 rows in set (0.00 sec)

query is: get all content for language (fr) with content (hls). It returns all defaults for (en) and (mp4) as well. Now I have to choose which one to return???  Each ID needs to be present once.