Could somebody please help me with a problem I'm having. I think it will be easier if I draw what I would like to do with my database:
I have two tables:
[WorkID]-[Period]-[TrackcarDate]--[SD]--[Lat]
-- 1409 --- Bef ---- 07-Jan-05 ---- 2.1 -- 0.8
-- 1409 --- Aft ---- 27-Apr-06 ---- 1.2 --...