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Joe,
great tip! but an easier way to get the holes, change this:
SELECT A.SEQ FROM MYFILE A
WHERE NOT EXISTS
(SELECT 1 FROM MYFILE B WHERE B.SEQ = (A.SEQ+1))
to:
SELECT (A.SEQ+1) as holes FROM MYFILE A
WHERE NOT EXISTS
(SELECT 1 FROM MYFILE B WHERE B.SEQ = (A.SEQ+1))
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