Question

I’m trying to accomplish this bit of code:

ORDER BY IF(j.groups IS NULL OR j.groups = '',  IF(j.title IS NULL, i.title), j.groups)

In English: order by j.groups first if it exists, then by j.title if it eixsts, then finally by i.title. But the above isn’t working out.

Answer 1

Try this:

ORDER BY IF(j.groups IS NULL OR j.groups = '', IFNULL(j.title, i.title), j.groups);

OR

ORDER BY COALESCE(j.groups, j.title, i.title);

OR

ORDER BY IF(j.groups IS NULL OR j.groups = '', IF(j.title IS NULL, i.title, 1), j.groups);