The trigger in the following example sends e-mail to “purchasing” when an update causes the number of items on hand (onhand) in an inventory table (part) to fall below a certain level (min_onhand).
1> create trigger reorder 2> on part 3> for update as 4> if update(onhand) 5> if (select onhand - min_onhand 6> from inserted <= 0 7> begin 8> execute xp_sendmail 9> @subject="Inventory Notice" 10> @recipient="purchasing" 11> @message="Parts need to be reordered." 12> end