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When fileB has more than one key?


The following works when fileB has only one key. How can I do the same when fileB has two+ keys?


update fileA a
set a.field1 =
(select b.field2 from fileB b
where a.keyfield1 = b.keyfield1
where a.keyfield1 = (select keyfield1 from fileB b where a.keyfield1 = b.keyfield1)



Is there a simpler method - maybe using JOIN ON?

Thanks!





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