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An Open SQL SELECT statement without an explicit ORDER BY clause will retrieve rows in an unpredictable order. On pool/cluster tables, the current implementation of Open SQL SELECT returns the result set in the primary key order, but that’s not the case for transparent tables. That’s why it’s safer to always use an ORDER BY clause.
SELECT
ORDER BY
OPEN CURSOR C FOR SELECT * FROM SBOOK WHERE CARRID = 'LH '. "NonCompliant SELECT * FROM FLIGHTS WHERE FLIGHT_NUMBER = 'LH '."NonCompliant