futhonguy,
I already answered this question in the other thread you posted about an hour ago:
http://www.daniweb.com/forums/thread235823.html

yes you can always do that provided that the field name has unique constraint on it.Otherwise you will end up deleting more than one row with the same field name but different ids.
Is this a duplicate thread you created. If in case, you forgot the one, after you created it, you can always see the threads started by you in the profile or else browse the threads subscribed by you; both options accessible from the control panel one of the menu from the row of top header menus

This is simple, just instead of WHEREing the id in your query, you should WHERE the field. BUT take care with this, if you have two or more rows in which the field have the same name, then I'm afraid you'll be deleting all of these rows...

Thanks guys.
will give that a try.