Oracle实现分页查询的SQL语法汇总

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。