Hi All,

     With a database that contains tables PetInv and Purchases:

mysql> update PetInv
    -> set PetInv.Qty = PetInv.Qty + Purchases.Qty
    -> where PetInv.ItemNo = Purchases.ItemNo;
ERROR 1109: Unknown table 'Purchases' in where clause

As you can see I'm trying to add purchase quantities to existing quantities,
but obviously I'm not doing it right.  Any ideas?

TIA,
Jim

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