ORACLE分页查询SQL源代码

作者：[网上资料 ]

--1:无ORDER BY排序的写法。(效率最高) --(经过测试，此方法成本最低，只嵌套一层，速度最快！即使查询的数据量再大，也几乎不受影响，速度依然！) SELECT *  FROM (Select ROWNUM AS ROWNO, T.*  from k_task T  where Flight_date between to_date('20060501', 'yyyymmdd') and  to_date('20060731', 'yyyymmdd')  AND ROWNUM <= 20) TABLE_ALIAS WHERE TABLE_ALIAS.ROWNO >= 10; --2:有ORDER BY排序的写法。(效率最高) --(经过测试，此方法随着查询范围的扩大，速度也会越来越慢哦！) SELECT *  FROM (SELECT TT.*, ROWNUM AS ROWNO  FROM (Select t.*  from k_task T  where flight_date between to_date('20060501', 'yyyymmdd') and  to_date('20060531', 'yyyymmdd')  ORDER BY FACT_UP_TIME, flight_no) TT  WHERE ROWNUM <= 20) TABLE_ALIAS where TABLE_ALIAS.rowno >= 10; --3:无ORDER BY排序的写法。(建议使用方法1代替) --(此方法随着查询数据量的扩张，速度会越来越慢哦！) SELECT *  FROM (Select ROWNUM AS ROWNO, T.*  from k_task T  where Flight_date between to_date('20060501', 'yyyymmdd') and  to_date('20060731', 'yyyymmdd')) TABLE_ALIAS WHERE TABLE_ALIAS.ROWNO <= 20  AND TABLE_ALIAS.ROWNO >= 10; --TABLE_ALIAS.ROWNO between 10 and 100; --4:有ORDER BY排序的写法.(建议使用方法2代替) --(此方法随着查询范围的扩大，速度会越来越慢哦！) SELECT *  FROM (SELECT TT.*, ROWNUM AS ROWNO  FROM (Select *  from k_task T  where flight_date between to_date('20060501', 'yyyymmdd') and  to_date('20060531', 'yyyymmdd')  ORDER BY FACT_UP_TIME, flight_no) TT) TABLE_ALIAS where TABLE_ALIAS.rowno BETWEEN 10 AND 20; --5另类语法。(有ORDER BY写法） --(语法风格与传统的SQL语法不同，不方便阅读与理解，为规范与统一标准，不推荐使用。) With partdata as(  SELECT ROWNUM AS ROWNO, TT.* FROM (Select *  from k_task T  where flight_date between to_date('20060501', 'yyyymmdd') and  to_date('20060531', 'yyyymmdd')  ORDER BY FACT_UP_TIME, flight_no) TT  WHERE ROWNUM <= 20)  Select * from partdata where rowno >= 10; --6另类语法。(无ORDER BY写法） With partdata as(  Select ROWNUM AS ROWNO, T.*  From K_task T  where Flight_date between to_date('20060501', 'yyyymmdd') and  To_date('20060531', 'yyyymmdd')  AND ROWNUM <= 20)  Select * from partdata where Rowno >= 10;  |