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SQL Server 存儲過程的經典分頁

來源:互聯網  2007-06-23 04:20:08  評論

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 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大于多少和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

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(1.0*@rowcount/@pagesize) 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的遊標存儲過程分頁) 效率最差,但是最爲通用

在實際情況中,要具體分析。

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 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大于多少和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 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(1.0*@rowcount/@pagesize) 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的遊標存儲過程分頁) 效率最差,但是最爲通用 在實際情況中,要具體分析。
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