Is it possible to join two files in SQL as follows:

FileA
a.Cust#
a.Cust_type_Buyer_or_Seller value "B" or "S"



FileB
b.cust#_buyer example value 123
b.cust#_seller example value 789


Is it possible to join FileA to FileB where a.Cust# will join with b.cust#_buyer ONLY when a.Cust_type_Buyer_or_Seller = "B", and also join with b.cust#_seller ONLY when a.Cust_type_Buyer_or_Seller = "S" ?


Clear as mud?

Hoping this can be done with a CASE statement?

Or maybe with two separate queries?

Thanks in advance!



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