-- 我們想把最先進入公司的5個人找出來
SELECT * FROM emp WHERE ROWNUM <= 5 ORDER BY hiredate;
或
SELECT * FROM (SELECT * FROM emp ORDER BY hiredate)
WHERE ROWNUM <= 5;
-- 我們想把最先進入公司的6~10個人找出來!!!!!!!!!!!!!!
SELECT * FROM (SELECT * FROM emp ORDER BY hiredate)
WHERE ROWNUM <= 10
MINUS
SELECT * FROM (SELECT * FROM emp ORDER BY hiredate)
WHERE ROWNUM <= 5;