用rownum實現(xiàn)大于、小于邏輯（返回rownum在4—10之間的數(shù)據(jù)）（minus操作，速度會受影響）?
select rownum,month,sell from sale where rownum<10?
minus?
select rownum,month,sell from sale where rownum<5;?
返回第5—9條紀錄，按月份排序?
select * from (select rownum row_id ,month,sell
from (select month,sell from sale group by month,sell))?
where row_id between 5 and 9;
posted on 2006-04-03 15:55
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