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  3. March 2016

SQL v5r4: any simple example of how to update one field1 in fileA from a different field2 in fileB

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?



(I cant use MERGE as it must function on v5r4 for a few more months)





Thanks!




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