>>I can do it in the UI, but I thought it would be better to keep it in the DB code. I might rethink that, though.
>>>
>>>Can you UPDATE cs_enddate field from somewhere else?
>
>No I ask because IF you didn't change anywhere cs_enddate but from the DELETE trigger you could use that as a check to see from where that triggers is fired.

No, it's the update trigger normally fires from changes made through the UI. How do you check to see from where the trigger is fired?