Hi,
What is a good (best) practice of maintaining value in a column of one table based on a sum values of column(s) in another table? Here is an example: Table 1 – Vendors that has a column TotalAmount; Table 2 – PurchaseOrders that has a column PoAmount. I need to maintain in the Vendors.TotalAmount sum of all values in PoAmount for each vendor. Therefore, when adding a new P.O. the value in Vendors.TotalAmount should be increased. When a P.O. is deleted it should be decreased. When P.O. amount changes, the value in Vendors.TotalAmount also should change (increased or decreased). In VFP app with VFP data I was doing it all “manually”. But I think there should be a better way of doing it with SQL Server as a back end. Looking forward to hearing suggestions. TIA.
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