Help! I need to find the difference between 2 time stamps. If I have the columns Task and TimeStamp, I'm looking for the difference between TimeStamp of row n & of row (n-1). I can't do this in query builder, as I learned... I know that I can use the dif function or a lag function, but where would I put this? Would I need to make a new program to pull the needed data from the existing table and then make the calculation? I wish I could just use Excel!! Any help would be GREATLY appreciated! ... View more