I’ve never run into wm_concat before when using Oracle, but I saw it in a statement similar to this earlier today: SELECT WM_CONCAT(id) FROM chris.item WHERE item_type LIKE ‘%floppy%’; Of course, it didn’t work: ORA-00904: “WM_CONCAT”: invalid identifier It looks like WM_CONCAT isn’t a supported command (Error when using wm_concat function), and possibly the code … Continue reading ORA-00904: “WM_CONCAT”: invalid identifier