SQL Server 存儲過程的分頁方案比拼
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
插入數據:(2萬條,用更多的數據測試會明顯一些)SET IDENTITY_INSERT TestTable ON
declare @i intset @i=1while @i<=20000begin insert into TestTable([id], FirstName, LastName, Country,Note) values(@i, 'FirstName_XXX','LastName_XXX','Country_XXX','Note_XXX') set @i=@i+1end
SET IDENTITY_INSERT TestTable OFF
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分頁方案一:(利用Not In和SELECT TOP分頁)語句形式:SELECT TOP 10 *FROM TestTableWHERE (ID NOT IN (SELECT TOP 20 id FROM TestTable ORDER BY id))ORDER BY ID
SELECT TOP 頁大小 *FROM TestTableWHERE (ID NOT IN (SELECT TOP 頁大小*頁數 id FROM 表 ORDER BY id))ORDER BY ID
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分頁方案二:(利用ID大于多少和SELECT TOP分頁)語句形式:SELECT TOP 10 *FROM TestTableWHERE (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 TestTableWHERE (ID > (SELECT MAX(id) FROM (SELECT TOP 頁大小*頁數 id FROM 表 ORDER BY id) AS T))ORDER BY ID
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分頁方案三:(利用SQL的游標存儲過程分頁)create; procedure XiaoZhengGe@sqlstr nvarchar(4000), --查詢字符串@currentpage int, --第N頁@pagesize int --每頁行數asset nocount ondeclare @P1 int, --P1是游標的id@rowcount intexec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@rowcount=@rowcount outputselect ceiling(1.0*@rowcount/@pagesize) as 總頁數--,@rowcount as 總行數,@currentpage as 當前頁 set @currentpage=(@currentpage-1)*@pagesize+1exec sp_cursorfetch @P1,16,@currentpage,@pagesize exec sp_cursorclose @P1set nocount off
其它的方案:如果沒有主鍵,可以用臨時表,也可以用方案三做,但是效率會低。建議優化的時候,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大于多少和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的游標存儲過程分頁);效率最差,但是最為通用