"Interesting".. yeah, I guess that's one way to put it.

I've only just recently started learning Oracle, and I prefer (gasp) MS-SQL.
So doing a GROUP BY on the table that is NOT within the wm_concat() should help eliminate (or, at the very least, give a different) error message?
EDIT: When using anything for GROUP BY, I get either "not a GROUP BY expression" or "not a single-group group expression".
Thank you,