Answer by Gordon Linoff for How to fix SELECT statement to return duplicates

You can use window functions:

SELECT comptitle, trknum, cdtitleFROM (SELECT comptitle, trknum, cdtitle,             COUNT(*) OVER (PARTITION BY comptitle) as cnt      FROM track t JOIN           recording r           ON t.rcdid = r.rcdid JOIN           composition c           ON r.compid = c.compid JOIN           cd            ON cd.cdid = t.cdid     ) tWHERE cnt >= 2ORDER BY cnt, comptitle;