真正高效的SQLSERVER分页查询(多种方案)

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sqlserver数据库分页查询一直是sqlserver的短板,闲来无事,想出几种方法,假设有表ARTICLE,字段ID、YEAR...(其他省略),数据53210条(客户真实数据,量不大),分页查询每页30条,查询第1500页(即第45001-45030条数据),字段ID聚集索引,YEAR无索引,sqlserver版本:2008R2

第一种方案、最简单、普通的方法


<div class="codetitle"><a style="CURSOR: pointer" data="58770" class="copybut" id="copybut58770" onclick="doCopy('code58770')"> 代码如下:
<div class="codebody" id="code58770">
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

平均查询100次所需时间:45s

第二种方案


<div class="codetitle"><a style="CURSOR: pointer" data="50484" class="copybut" id="copybut50484" onclick="doCopy('code50484')"> 代码如下:
<div class="codebody" id="code50484">
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

平均查询100次所需时间:138S

第三种方案


<div class="codetitle"><a style="CURSOR: pointer" data="28458" class="copybut" id="copybut28458" onclick="doCopy('code28458')"> 代码如下:
<div class="codebody" id="code28458">
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

平均查询100次所需时间:21S

第四种方案


<div class="codetitle"><a style="CURSOR: pointer" data="67979" class="copybut" id="copybut67979" onclick="doCopy('code67979')"> 代码如下:
<div class="codebody" id="code67979">
SELECT
FROM ARTICLE w1
WHERE ID in
(
SELECT top 30 ID FROM
(
SELECT top 45030 ID,w.ID ASC
)
ORDER BY w1.YEAR DESC,w1.ID DESC

平均查询100次所需时间:20S

第五种方案


<div class="codetitle"><a style="CURSOR: pointer" data="49416" class="copybut" id="copybut49416" onclick="doCopy('code49416')"> 代码如下:<div class="codebody" id="code49416">
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

平均查询100次所需时间:15S

查询第1000-1030条记录


第一种方案


<div class="codetitle"><a style="CURSOR: pointer" data="31662" class="copybut" id="copybut31662" onclick="doCopy('code31662')"> 代码如下:<div class="codebody" id="code31662">
SELECT TOP 30
FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 ID FROM ARTICLE ORDER BY YEAR DESC,ID DESC

平均查询100次所需时间:80s

第二种方案


<div class="codetitle"><a style="CURSOR: pointer" data="58365" class="copybut" id="copybut58365" onclick="doCopy('code58365')"> 代码如下:<div class="codebody" id="code58365">
SELECT FROM (   
SELECT TOP 30
FROM (SELECT TOP 1030 FROM ARTICLE ORDER BY YEAR DESC,f.ID DESC
) s ORDER BY s.YEAR DESC,s.ID DESC

平均查询100次所需时间:30S

第三种方案


<div class="codetitle"><a style="CURSOR: pointer" data="78255" class="copybut" id="copybut78255" onclick="doCopy('code78255')"> 代码如下:<div class="codebody" id="code78255">
SELECT
FROM ARTICLE w1,
(
SELECT TOP 30 ID FROM
(
SELECT TOP 1030 ID,w1.ID DESC

平均查询100次所需时间:12S

第四种方案


<div class="codetitle"><a style="CURSOR: pointer" data="45143" class="copybut" id="copybut45143" onclick="doCopy('code45143')"> 代码如下:<div class="codebody" id="code45143">
SELECT FROM ARTICLE w1
WHERE ID in
(
SELECT top 30 ID FROM
(
SELECT top 1030 ID,w1.ID DESC

平均查询100次所需时间:13S

第五种方案


<div class="codetitle"><a style="CURSOR: pointer" data="44480" class="copybut" id="copybut44480" onclick="doCopy('code44480')"> 代码如下:<div class="codebody" id="code44480">
SELECT w2.n,(   
SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC,ID FROM ARTICLE
) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 ORDER BY w2.n ASC

平均查询100次所需时间:14S
由此可见在查询页数靠前时,效率3>4>5>2>1,页码靠后时5>4>3>1>2,再根据用户习惯,一般用户的检索只看最前面几页,因此选择3 4 5方案均可,若综合考虑方案5是最好的选择,但是要注意sql2000不支持row_number()函数,由于时间和条件的限制没有做更深入、范围更广的测试,有兴趣的可以仔细研究下。
以下是根据第四种方案编写的一个分页存储过程:
<div class="codetitle"><a style="CURSOR: pointer" data="19913" class="copybut" id="copybut19913" onclick="doCopy('code19913')"> 代码如下:<div class="codebody" id="code19913">
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,--总页数输出
@RCount int output,--总记录数输出
@sys_Table nvarchar(100),--查询表名
@sys_Key varchar(50),--主键
@sys_Fields nvarchar(500),--查询字段
@sys_Where nvarchar(3000),--查询条件
@sys_Order nvarchar(100),--排序字段
@sys_Begin int,--开始位置
@sys_PageIndex int,--当前页数
@sys_PageSize int --页大小
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) --如果输入的当前页数大于实际总页数,则把实际总页数赋值给当前页数
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

原文链接:https://www.f2er.com/mssql/63540.html
sqlserversqlserver分页查询

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