Oracle實現分頁查詢的SQL語法匯總，oracle分頁sql語法

Oracle實現分頁查詢的SQL語法匯總，oracle分頁sql語法

本文實例匯總了Oracle實現分頁查詢的SQL語法，整理給大家供大家參考之用，詳情如下：

1.無ORDER BY排序的寫法。(效率最高)

經過測試，此方法成本最低，只嵌套一層，速度最快！即使查詢的數據量再大，也幾乎不受影響，速度依然！

sql語句如下：

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排序的寫法。(效率最高)

經過測試，此方法隨著查詢范圍的擴大，速度也會越來越慢！

sql語句如下：

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.無ORDER BY排序的寫法。(建議使用方法1代替)

此方法隨著查詢數據量的擴張，速度會越來越慢！

sql語句如下：

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排序的寫法.(建議使用方法2代替)

此方法隨著查詢范圍的擴大，速度也會越來越慢！

sql語句如下：

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.另類語法。(有ORDER BY寫法）

該語法風格與傳統的SQL語法不同，不方便閱讀與理解，為規范與統一標准，不推薦使用。此處貼出代碼供大家參考之用。

sql語句如下：

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.另類語法 。(無ORDER BY寫法）

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; 

相信本文所述代碼能夠對大家有一定的參考借鑒價值。

實現oracle分頁的sql語句

下面是用ORACLE數據庫pl/sql編程實現的一個方式：
-------------------創建一個包--------------------------
create or replace package pages_query_pak as
type pages_cursor is ref cursor; --定一個游標，保存數據查詢得到的結果集
end pages_query_pak;
------------------創建一個過程----------------------
create or replace procedure pages_pro(
tableName in varchar2,
pageSize in number,--每一頁顯示的記錄數
pageNow in number,--顯示第幾頁
myRows out number,--總記錄數
pageCount out number,--總頁數
page_cursor out pages_query_pak.pages_cursor--返回的記錄集 這裡有用了上面那個包
) is
v_sql varchar2(1000);
v_begin number:=(pageNow-1)*pageSize+1;
v_end number:=pageNow*pageSize;
begin
v_sql:='select * from (select bt.*,rownum rnum from (select * from '|| tableName ||')bt
where rownum<='||v_end||') where rnum>='||v_begin;
open page_cursor for v_sql;
--計算myRows和pageCount

v_sql:='select count(*) from '||tableName;
execute immediate v_sql into myRows;
if mod(myRows,pageSize)=0 then
pageCount:=myRows/pageSize;
else
pageCount:=myRows/pageSize+1;
end if;
end;
 

sql分頁查詢與oracle分頁查詢的轉換

select top "+(end-begin)+",
numbers,
state,
title,
deptname,
time,
fromuser
from
(select oa_alarm.alarm_number numbers,oa_alarm.alarm_title title,oa_alarm.alarm_time time,oa_user.user_realname fromuser,oa_alarm.alarm_state state,oa_dept.dept_name deptname from
oa_alarm,oa_user,oa_dept where oa_alarm.alarm_fromuser=
oa_user.user_number and oa_alarm.alarm_dept=oa_dept.dept_number
deptsql order by oa_alarm.alarm_time desc)

where numbers not in (select top "+begin+"，numbers from (select oa_alarm.alarm_number numbers from
oa_alarm,oa_user,oa_dept where oa_alarm.alarm_fromuser=
oa_user.user_number and oa_alarm.alarm_dept=oa_dept.dept_number
deptsql order by oa_alarm.alarm_time desc))
大致這樣的，試試可不可以