>DECLARE @Test TABLE (Fld1 datetime, Fld2 datetime) >DECLARE @i int >SET @i = 0 >WHILE @i < 20 > BEGIN > INSERT INTO @Test VALUES (GETDATE()+@i, GETDATE()+@i*20) > SET @i = @i +1 > END >SELECT SUM(Fld2-Fld2) FROM @Test >I've no,idea what you're talking about :)