SQL Server 預存程序的分頁,這個問題已經討論過幾年了,很多朋友在問我,所以在此發表一下我的觀點 建立表: CREATE TABLE [TestTable] ( [ID] [int] IDENTITY (1, 1) NOT NULL , [FirstName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL , [LastName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL , [Country] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL , [Note] [nvarchar] (2000) COLLATE Chinese_PRC_CI_AS NULL ) ON [PRIMARY] GO 插入資料:(2萬條,用更多的資料測試會明顯一些) SET IDENTITY_INSERT TestTable ON declare @i int set @i=1 while @i<=20000 begin insert into TestTable([id], FirstName, LastName, Country,Note) values(@i, 'FirstName_XXX','LastName_XXX','Country_XXX','Note_XXX') set @i=@i+1 end SET IDENTITY_INSERT TestTable OFF ------------------------------------- 分頁方案一:(利用Not In和SELECT TOP分頁) 語句形式: SELECT TOP 10 * FROM TestTable WHERE (ID NOT IN (SELECT TOP 20 id FROM TestTable ORDER BY id)) ORDER BY ID SELECT TOP 頁大小 * FROM TestTable WHERE (ID NOT IN (SELECT TOP 頁大小*頁數 id FROM 表 ORDER BY id)) ORDER BY ID ------------------------------------- 分頁方案二:(利用ID大於多少和SELECT TOP分頁) 語句形式: SELECT TOP 10 * FROM TestTable WHERE (ID > (SELECT MAX(id) FROM (SELECT TOP 20 id FROM TestTable ORDER BY id) AS T)) ORDER BY ID SELECT TOP 頁大小 * FROM TestTable WHERE (ID > (SELECT MAX(id) FROM (SELECT TOP 頁大小*頁數 id FROM 表 ORDER BY id) AS T)) ORDER BY ID ------------------------------------- 分頁方案三:(利用SQL的遊標預存程序分頁) create procedure XiaoZhengGe @sqlstr nvarchar(4000), --查詢字串 @currentpage int, --第N頁 @pagesize int --每頁行數 as set nocount on declare @P1 int, --P1是遊標的id @rowcount int exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@rowcount=@rowcount output select ceiling([email=1.0*@rowcount/@pagesize]1.0*@rowcount/@pagesize[/email]) as 總頁數--,@rowcount as 總行數,@currentpage as 當前頁 set @currentpage=(@currentpage-1)*@pagesize+1 exec sp_cursorfetch @P1,16,@currentpage,@pagesize exec sp_cursorclose @P1 set nocount off 其它的方案:如果沒有主鍵,可以用暫存資料表,也可以用方案三做,但是效率會低。 建議最佳化的時候,加上主鍵和索引,查詢效率會提高。 通過SQL 查詢分析器,顯示比較:我的結論是: 分頁方案二:(利用ID大於多少和SELECT TOP分頁)效率最高,需要拼接SQL語句 分頁方案一:(利用Not In和SELECT TOP分頁) 效率次之,需要拼接SQL語句 分頁方案三:(利用SQL的遊標預存程序分頁) 效率最差,但是最為通用 在實際情況中,要具體分析。 更多的討論見: http://community.csdn.net/Expert/topic/3292/3292678.xml?temp=.1621515 |