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UPDATE "DATLIB"/"UFP1"
SET
UFP1 = (SELECT WFIELD2
FROM "DATLIB"/"UFP2"
WHERE UKEY1 = UKEY2)
WHERE EXISTS
(SELECT UFP2
FROM "DATLIB"/"UFP2"
WHERE UKEY1 = UKEY2)
you have to use the where exists in case file1 item
does NOT exist in file2 (otherwise be prepared to
deal with the *null value return.
this way, you only update records in file 1 that
occur in file2... other file1 records will be ignored
because the fail the EXISTS test.
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