oracle簡單分頁 jdbctemplate怎么實現(xiàn)oracle分頁查詢?
jdbctemplate怎么實現(xiàn)oracle分頁查詢?sql語句如下:分頁1SELECT *FROM (Select ROWNUM AS ROWNO, T.*from 表名 T(別名)where 表字
jdbctemplate怎么實現(xiàn)oracle分頁查詢?
sql語句如下:
分頁1
SELECT *
FROM (Select ROWNUM AS ROWNO, T.*
from 表名 T(別名)
where 表字段 between to_date("20060501", "yyyymmdd") and to_date("20060731", "yyyymmdd")
AND ROWNUM
WHERE TABLE_ALIAS.ROWNO >= 10
經(jīng)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(shù)據(jù)量再大,也幾乎不受影響,速度依然.
分頁2:
SELECT *
FROM (SELECT TT.*, ROWNUM AS ROWNO
FROM (Select t.*
from 表名 T(別名)
where flight_date between to_date("20060501", "yyyymmdd") and
to_date("20060531", "yyyymmdd")
ORDER BY FACT_UP_TIME, flight_no) TT(別名二)
WHERE ROWNUM
where TABLE_ALIAS.rowno >= 10
經(jīng)過測試,此方法隨著查詢范圍的擴大,速度也會越來越慢,
JDBC,Hibernate分頁怎樣實現(xiàn)?
答:方法分別為:
1)Hibernate的分頁:Queryquery=session.createQuery(fromStudent)query.setFirstResult(firstResult)//設置每頁開始的記錄號query.setMaxResults(resultNumber)//設置每頁顯示的記錄數(shù)Collectionstudents=query.list()
2)JDBC的分頁:根據(jù)不同的數(shù)據(jù)庫采用不同的sql分頁語句例如:Oracle中的sql語句為:SELECT*FROM(SELECTa.*,rownumrFROMTB_STUDENT)WHERErbetween2and10″查詢從記錄號2到記錄號10之間的所有記錄