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rownum

SELECT *
FROM (SELECT ROWNUM r, s.*FROM PDD.ORDER_CASH sWHERE ROWNUM <= 20
)
WHERE r >= 1;

BETWEEN

SELECT *
FROM (
SELECT ROWNUM r, s.*
FROM PDD.ORDER_CASH s
)
WHERE r BETWEEN 1 AND 20;

OFFSET FETCH

SELECT d.*
FROM DONORINFO d
WHERE d.BIRTHDAY BETWEEN TO_DATE('19800101', 'yyyymmdd') AND TO_DATE('20060731', 'yyyymmdd')
ORDER BY d.BIRTHDAY DESC
OFFSET 10 ROWS FETCH NEXT 10 ROWS ONLY;