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Oracle实现分页查询的SQL语法汇总_oracle_
2023-05-27
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简介 Oracle实现分页查询的SQL语法汇总_oracle_
本文实例汇总了Oracle实现分页查询的SQL语法，整理给大家供大家参考之用，详情如下：
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！
sql语句如下：
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！
sql语句如下：
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！
sql语句如下：
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，速度也会越来越慢！
sql语句如下：
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）
该语法风格与传统的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。此处贴出代码供大家参考之用。
sql语句如下：
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; 相信本文所述代码能够对大家有一定的参考借鉴价值。
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