如何獲取表格的特定行？

Question

我正在使用Oracle數據庫，我有一個有19億行記錄的表。我想要獲得從100,000,001到200,000,000不等的記錄行。有人可以幫助我嗎？先謝謝你。

Answer 1

一般來說你想要一個分頁查詢，這將是以下格式：

select t.* 
    from (select t.*, rownum rn 
      from (select t.yourfields 
        from yourtab t 
        order by t.something) 
      where rownum <= end_rownum 
     ) t 
    where rn >= offset; 

或

select * 
    from (select t.yourfields, row_number() over (order by t.something) rn 
      from yourtab t) 
where rn between start_rownum and end_rownum; 

Answer 2

，如果你的意思是那些範圍rownum那麼這裏就是簡單的查詢

select * from (select e.*,rownum test from hr.employees e) where test>5 and test <50;