Sqlserver數(shù)據(jù)庫(kù)分頁(yè)查詢(xún)一直是Sqlserver的短板，閑來(lái)無(wú)事，想出幾種方法，假設(shè)有表ARTICLE,字段ID、YEAR...(其他省略)，數(shù)據(jù)53210條(客戶(hù)真實(shí)數(shù)據(jù)，量不大)，分頁(yè)查詢(xún)每頁(yè)30條，查詢(xún)第1500頁(yè)(即第45001-45030條數(shù)據(jù))，字段ID聚集索引，YEAR無(wú)索引，Sqlserver版本：2008R2
第一種方案、最簡(jiǎn)單、普通的方法：
復(fù)制代碼代碼如下:
SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 45000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC
平均查詢(xún)100次所需時(shí)間：45s
第二種方案：
復(fù)制代碼代碼如下:
SELECT * FROM (SELECT TOP 30 * FROM (SELECT TOP 45030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC
平均查詢(xún)100次所需時(shí)間：138S
第三種方案：
復(fù)制代碼代碼如下:
SELECT * FROM ARTICLE w1,
(
SELECT TOP 30 ID FROM
(
SELECT TOP 50030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
) w ORDER BY w.YEAR ASC, w.ID ASC
) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC
平均查詢(xún)100次所需時(shí)間：21S
第四種方案：
復(fù)制代碼代碼如下:
SELECT * FROM ARTICLE w1
WHERE ID in
(
SELECT top 30 ID FROM
(
SELECT top 45030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
) w ORDER BY w.YEAR ASC, w.ID ASC
)
ORDER BY w1.YEAR DESC, w1.ID DESC
平均查詢(xún)100次所需時(shí)間：20S
第五種方案：
復(fù)制代碼代碼如下:
SELECT w2.n, w1.* FROM ARTICLE w1, (SELECT TOP 50030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE ) w2 WHERE w1.ID = w2.ID AND w2.n > 50000 ORDER BY w2.n ASC
平均查詢(xún)100次所需時(shí)間：15S
查詢(xún)第1000-1030條記錄
第一種方案：
復(fù)制代碼代碼如下:
SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC
平均查詢(xún)100次所需時(shí)間：80s
第二種方案：
復(fù)制代碼代碼如下:
SELECT * FROM ( SELECT TOP 30 * FROM (SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC
平均查詢(xún)100次所需時(shí)間：30S
第三種方案：
復(fù)制代碼代碼如下:
SELECT * FROM ARTICLE w1,
(
SELECT TOP 30 ID FROM
(
SELECT TOP 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
) w ORDER BY w.YEAR ASC, w.ID ASC
) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC
平均查詢(xún)100次所需時(shí)間：12S
第四種方案：
復(fù)制代碼代碼如下:
SELECT * FROM ARTICLE w1
WHERE ID in
(
SELECT top 30 ID FROM
(
SELECT top 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
) w ORDER BY w.YEAR ASC, w.ID ASC
)
ORDER BY w1.YEAR DESC, w1.ID DESC
平均查詢(xún)100次所需時(shí)間：13S
第五種方案：
復(fù)制代碼代碼如下:
SELECT w2.n, w1.* FROM ARTICLE w1,( SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 ORDER BY w2.n ASC
平均查詢(xún)100次所需時(shí)間：14S
由此可見(jiàn)在查詢(xún)頁(yè)數(shù)靠前時(shí)，效率3>4>5>2>1，頁(yè)碼靠后時(shí)5>4>3>1>2，再根據(jù)用戶(hù)習(xí)慣，一般用戶(hù)的檢索只看最前面幾頁(yè)，因此選擇3 4 5方案均可，若綜合考慮方案5是最好的選擇，但是要注意SQL2000不支持row_number()函數(shù)，由于時(shí)間和條件的限制沒(méi)有做更深入、范圍更廣的測(cè)試，有興趣的可以仔細(xì)研究下。
以下是根據(jù)第四種方案編寫(xiě)的一個(gè)分頁(yè)存儲(chǔ)過(guò)程：
復(fù)制代碼代碼如下:
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[sys_Page_v2]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[sys_Page_v2]
GO
CREATE PROCEDURE [dbo].[sys_Page_v2]
@PCount int output, --總頁(yè)數(shù)輸出
@RCount int output, --總記錄數(shù)輸出
@sys_Table nvarchar(100), --查詢(xún)表名
@sys_Key varchar(50), --主鍵
@sys_Fields nvarchar(500), --查詢(xún)字段
@sys_Where nvarchar(3000), --查詢(xún)條件
@sys_Order nvarchar(100), --排序字段
@sys_Begin int, --開(kāi)始位置
@sys_PageIndex int, --當(dāng)前頁(yè)數(shù)
@sys_PageSize int --頁(yè)大小
AS
SET NOCOUNT ON
SET ANSI_WARNINGS ON
IF @sys_PageSize < 0 OR @sys_PageIndex < 0
BEGIN
RETURN
END
DECLARE @new_where1 NVARCHAR(3000)
DECLARE @new_order1 NVARCHAR(100)
DECLARE @new_order2 NVARCHAR(100)
DECLARE @Sql NVARCHAR(4000)
DECLARE @SqlCount NVARCHAR(4000)
DECLARE @Top int
if(@sys_Begin <=0)
set @sys_Begin=0
else
set @sys_Begin=@sys_Begin-1
IF ISNULL(@sys_Where,'') = ''
SET @new_where1 = ' '
ELSE
SET @new_where1 = ' WHERE ' + @sys_Where
IF ISNULL(@sys_Order,'') <> ''
BEGIN
SET @new_order1 = ' ORDER BY ' + Replace(@sys_Order,'desc','')
SET @new_order1 = Replace(@new_order1,'asc','desc')
SET @new_order2 = ' ORDER BY ' + @sys_Order
END
ELSE
BEGIN
SET @new_order1 = ' ORDER BY ID DESC'
SET @new_order2 = ' ORDER BY ID ASC'
END
SET @SqlCount = 'SELECT @RCount=COUNT(1),@PCount=CEILING((COUNT(1)+0.0)/'
+ CAST(@sys_PageSize AS NVARCHAR)+') FROM ' + @sys_Table + @new_where1
EXEC SP_EXECUTESQL @SqlCount,N'@RCount INT OUTPUT,@PCount INT OUTPUT',
@RCount OUTPUT,@PCount OUTPUT
IF @sys_PageIndex > CEILING((@RCount+0.0)/@sys_PageSize) --如果輸入的當(dāng)前頁(yè)數(shù)大于實(shí)際總頁(yè)數(shù),則把實(shí)際總頁(yè)數(shù)賦值給當(dāng)前頁(yè)數(shù)
BEGIN
SET @sys_PageIndex = CEILING((@RCount+0.0)/@sys_PageSize)
END
set @sql = 'select '+ @sys_fields +' from ' + @sys_Table + ' w1 '
+ ' where '+ @sys_Key +' in ('
+'select top '+ ltrim(str(@sys_PageSize)) +' ' + @sys_Key + ' from '
+'('
+'select top ' + ltrim(STR(@sys_PageSize * @sys_PageIndex + @sys_Begin)) + ' ' + @sys_Key + ' FROM '
+ @sys_Table + @new_where1 + @new_order2
+') w ' + @new_order1
+') ' + @new_order2
print(@sql)
Exec(@sql)
GO