create trigger TRUMemoMerge on Documents after INSERT,UPDATE as


	if ((select TRIGGER_NESTLEVEL()) < 2) begin

		declare @memo_before varchar(max) = (select cast(memo as varchar(max)) from deleted)
		declare @memo_after varchar(max) = (select cast(memo as varchar(max)) from inserted)

		if ( @memo_after not like @memo_before ) begin

			declare @vorid int = (select vorid from inserted)
			declare @belid int = (select belid from inserted)

			update Documents set Memo = @memo_after where VorID = @vorid and BelID <> @belid

		end

	end