oracle 高效分页查询

无ORDER BY排序的写法。

 SELECT *
  FROM (SELECT ROWNUM AS rowno, t.*
          FROM emp t
         WHERE hire_date BETWEEN TO_DATE ('20060501', 'yyyymmdd')
                             AND TO_DATE ('20060731', 'yyyymmdd')
           AND ROWNUM <= 20) table_alias
 WHERE table_alias.rowno >= 10;

有ORDER BY排序的写法。

 SELECT *
  FROM (SELECT tt.*, ROWNUM AS rowno
          FROM (  SELECT t.*
                    FROM emp t
                   WHERE hire_date BETWEEN TO_DATE ('20060501', 'yyyymmdd')
                                      AND TO_DATE ('20060731', 'yyyymmdd')
                ORDER BY create_time DESC, emp_no) tt
         WHERE ROWNUM <= 20) table_alias
 WHERE table_alias.rowno >= 10;

本文摘自Honey_Potter的博客，提供自己学习。