Several ways. Straight join
Select * from filea, fileb where (cust# = cust#_buyer and
cust_type_buyer_or_seller = 'B') or (cust# = cust#_seller and
cust_type_buyer_or_seller = 'S')
You can also use an union, and if you don't mind showing one side
multiple times, just join to one side multiple times.
Senior Programmer Analyst
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Sent: Thursday, December 10, 2015 1:27 PM
To: 'Midrange Systems Technical Discussion'
Subject: SQL: how to join two files using field depending on values
Is it possible to join two files in SQL as follows:
a.Cust_type_Buyer_or_Seller value "B" or "S"
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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