Warning:  [mysql error 3065] Expression #1 of ORDER BY clause is not in SELECT list, references column 'cedarcre_piwi690.piwi_images.date_available' which is not in SELECT list; this is incompatible with DISTINCT

SELECT DISTINCT(image_id)
  FROM piwi_image_category
    INNER JOIN piwi_images ON id = image_id
  WHERE
    category_id = 3

  ORDER BY date_available DESC, file ASC, id ASC
; in /home/cedarcre/public_html/photos/include/dblayer/functions_mysqli.inc.php on line 830