求分页SQL方案——怎样执行一次查询就查询出一页的数据并得出搜索总数？

[wyman25]

首先请各位注意：不是求具体的分页sql语句。
我现在面临的工作是：进行一个“音乐搜索”，要能进行分页查询，列表下方有常规的"下一页"，“上一页”，“共有XX条数据符合要求”这3个功能。就在这个“共有XX条数据符合要求”问题上，我遇到了困难，我现在的做法是：先将查询结果放进一个临时表中，使用count(*)统计符合搜索结果的总数，再对这个临时表进行一个分页查询。但这样做肯定有违背分页查询的精神的，甚至可以说比不用分页性能更低一点，因为始终要全部查询了一次（也就是查询并生产临时表的过程），这种做法实际上就有3此查询了(分别为:查询全部数据并生成临时表，查询临时表总数，对临时表进行分页查询)
有没有简便的SQL方案，能在执行分页查询的时候同时得出符合查询条件的总数？谢谢！

[王向飞]

刚做完这个

[ws_hgo]

你在加一列
该列符合查询条件的总数
不就行啦

[billpu]

放到存储过程 获得@@rowcount数量

[无涯大者]

路上學習幫頂下~

[王向飞]

WITH t AS (
		  SELECT 
			  rownum=ROW_NUMBER()OVER(ORDER BY InfoId)
			  ,[InfoId]      
			  ,[Abstract]  
		  FROM Bull as a
				  
)
  
			select 
			   t.[InfoId]      
			  ,t.[Abstract]
,b.rownum as TotalRow  
from t cross join (select top 1 rownum from t	order by t.rownum desc) as b
WHERE t.rownum BETWEEN  @PageRow*(@PageNo-1)+1  
AND   @PageRow*@PageNo  

[wyman25]

我现在的做法是这样
create proc getMusicList
@PageIndex int,
@PageLength int,
@Total int output
as
SELECT ROW_NUMBER() OVER(Music.ID) AS rownum,Music.Name
INTO #temp
FROM Music
SELECT @Total=COUNT(*) FROM #temp
select * from #temp where rownum>((@PageIndex-1)*@PageLength) and rownum<=(@PageIndex*@PageLength)
DROP TABLE #temp

我现在这样做是先将所有符合查询条件的数据查询到临时表，再取总数，再对临时表分页。但有什么更高性能的方法？

[jsjhj2008]

[code=SQL]set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

ALTER PROC [dbo].[P_viewPage_A]
/**//*
nzperfect [no_mIss] 高效通用分页存储过程(双向检索) 2007.5.7 QQ:34813284
敬告：适用于单一主键或存在唯一值列的表或视图
ps:Sql语句为8000字节,调用时请注意传入参数及sql总长度不要超过指定范围
*/
@TableName VARCHAR(200), --表名
@FieldList VARCHAR(2000), --显示列名，如果是全部字段则为*
@PrimaryKey VARCHAR(100), --单一主键或唯一值键
@Where VARCHAR(2000), --查询条件 不含'where'字符，如id>10 and len(userid)>9
@Order VARCHAR(1000), --排序 不含'order by'字符，如id asc,userid desc，必须指定asc或desc
--注意当@SortType=3时生效，记住一定要在最后加上主键，否则会让你比较郁闷
@SortType INT, --排序规则 1:主键/唯一值正序asc 2:主键/唯一值倒序desc 3:非主键或多列排序方法
@RecorderCount INT, --记录总数 0:会返回总记录
@PageSize INT, --每页输出的记录数
@PageIndex INT, --当前页数
@TotalCount INT OUTPUT , --记返回总记录
@TotalPageCount INT OUTPUT --返回总页数
AS
SET NOCOUNT ON
IF ISNULL(@TotalCount,'') = '' SET @TotalCount = 0
SET @Order = RTRIM(LTRIM(@Order))
SET @PrimaryKey = RTRIM(LTRIM(@PrimaryKey))
SET @FieldList = REPLACE(RTRIM(LTRIM(@FieldList)),' ','')
WHILE CHARINDEX(', ',@Order) > 0 or CHARINDEX(' ,',@Order) > 0
BEGIN
SET @Order = REPLACE(@Order,', ',',')
SET @Order = REPLACE(@Order,' ,',',')
END
IF ISNULL(@TableName,'') = '' or ISNULL(@FieldList,'') = ''
or ISNULL(@PrimaryKey,'') = ''
or @SortType < 1 or @SortType >3
or @RecorderCount < 0 or @PageSize < 0 or @PageIndex < 0
BEGIN
PRINT('ERR_00')
RETURN
END
IF @SortType = 3
BEGIN
IF (UPPER(RIGHT(@Order,4))!=' ASC' AND UPPER(RIGHT(@Order,5))!=' DESC')
BEGIN PRINT('ERR_02') RETURN END
END
DECLARE @new_where1 VARCHAR(1000)
DECLARE @new_where2 VARCHAR(1000)
DECLARE @new_order1 VARCHAR(1000)
DECLARE @new_order2 VARCHAR(1000)
DECLARE @new_order3 VARCHAR(1000)
DECLARE @Sql VARCHAR(8000)
DECLARE @SqlCount NVARCHAR(4000)
IF ISNULL(@where,'') = ''
BEGIN
SET @new_where1 = ' '
SET @new_where2 = ' Where '
END
ELSE
BEGIN
SET @new_where1 = ' Where ' + @where
SET @new_where2 = ' Where ' + @where + ' AND '
END
IF ISNULL(@order,'') = '' or @SortType = 1 or @SortType = 2
BEGIN
IF @SortType = 1
BEGIN
SET @new_order1 = ' orDER BY ' + @PrimaryKey + ' ASC'
SET @new_order2 = ' orDER BY ' + @PrimaryKey + ' DESC'
END
IF @SortType = 2
BEGIN
SET @new_order1 = ' orDER BY ' + @PrimaryKey + ' DESC'
SET @new_order2 = ' orDER BY ' + @PrimaryKey + ' ASC'
END
END
ELSE
BEGIN
SET @new_order1 = ' orDER BY ' + @Order
END

IF @SortType = 3 AND CHARINDEX(','+@PrimaryKey+' ',','+@Order)>0
BEGIN
SET @new_order1 = ' orDER BY ' + @Order
SET @new_order2 = @Order + ','
SET @new_order2 = REPLACE(REPLACE(@new_order2,'ASC,','{ASC},'),'DESC,','{DESC},')
SET @new_order2 = REPLACE(REPLACE(@new_order2,'{ASC},','DESC,'),'{DESC},','ASC,')
SET @new_order2 = ' orDER BY ' + SUBSTRING(@new_order2,1,LEN(@new_order2)-1)
IF @FieldList <> '*'
BEGIN
SET @new_order3 = REPLACE(REPLACE(@Order + ',','ASC,',','),'DESC,',',')
SET @FieldList = ',' + @FieldList
WHILE CHARINDEX(',',@new_order3)>0
BEGIN
IF CHARINDEX(SUBSTRING(','+@new_order3,1,CHARINDEX(',',@new_order3)),','+@FieldList+',')>0
BEGIN
SET @FieldList =
@FieldList + ',' + SUBSTRING(@new_order3,1,CHARINDEX(',',@new_order3))
END
SET @new_order3 =
SUBSTRING(@new_order3,CHARINDEX(',',@new_order3)+1,LEN(@new_order3))
END
SET @FieldList = SUBSTRING(@FieldList,2,LEN(@FieldList))
END
END

[jsjhj2008]

SET @SqlCount = 'Select @TotalCount=COUNT(*),@TotalPageCount=CEILING((COUNT(*)+0.0)/'
+ CAST(@PageSize AS VARCHAR)+') FROM (Select * FROM ' + @TableName + @new_where1+') AS T'
IF @RecorderCount = 0
BEGIN
EXEC SP_EXECUTESQL @SqlCount,N'@TotalCount INT OUTPUT,@TotalPageCount INT OUTPUT',
@TotalCount OUTPUT,@TotalPageCount OUTPUT
END
ELSE
BEGIN
Select @TotalCount = @RecorderCount
END
IF @PageIndex > CEILING((@TotalCount+0.0)/@PageSize)
BEGIN
SET @PageIndex = CEILING((@TotalCount+0.0)/@PageSize)
END
IF @PageIndex = 1 or @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize)
BEGIN
IF @PageIndex = 1 --返回第一页数据
BEGIN
SET @Sql = 'Select * FROM (Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '
+ @TableName + @new_where1 + @new_order1 +') AS TMP ' + @new_order1
END
IF @PageIndex >= CEILING((@TotalCount+0.0)/@PageSize) --返回最后一页数据
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('
+ 'Select TOP ' + STR(ABS(@PageSize*@PageIndex-@TotalCount-@PageSize))
+ ' ' + @FieldList + ' FROM '
+ @TableName + @new_where1 + @new_order2 + ' ) AS TMP '
+ @new_order1
END
END
ELSE

BEGIN
IF @SortType = 1 --仅主键正序排序
BEGIN
IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向检索
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '
+ @TableName + @new_where2 + @PrimaryKey + ' > '
+ '(Select MAX(' + @PrimaryKey + ') FROM (Select TOP '
+ STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey
+ ' FROM ' + @TableName
+ @new_where1 + @new_order1 +' ) AS TMP) '+ @new_order1
END
ELSE --反向检索
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('
+ 'Select TOP ' + STR(@PageSize) + ' '
+ @FieldList + ' FROM '
+ @TableName + @new_where2 + @PrimaryKey + ' < '
+ '(Select MIN(' + @PrimaryKey + ') FROM (Select TOP '
+ STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey
+ ' FROM ' + @TableName
+ @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2
+ ' ) AS TMP ' + @new_order1
END
END
IF @SortType = 2 --仅主键反序排序
BEGIN
IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向检索
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM '
+ @TableName + @new_where2 + @PrimaryKey + ' < '
+ '(Select MIN(' + @PrimaryKey + ') FROM (Select TOP '
+ STR(@PageSize*(@PageIndex-1)) + ' ' + @PrimaryKey
+' FROM '+ @TableName
+ @new_where1 + @new_order1 + ') AS TMP) '+ @new_order1
END
ELSE --反向检索
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ('
+ 'Select TOP ' + STR(@PageSize) + ' '
+ @FieldList + ' FROM '
+ @TableName + @new_where2 + @PrimaryKey + ' > '
+ '(Select MAX(' + @PrimaryKey + ') FROM (Select TOP '
+ STR(@TotalCount-@PageSize*@PageIndex) + ' ' + @PrimaryKey
+ ' FROM ' + @TableName
+ @new_where1 + @new_order2 +' ) AS TMP) '+ @new_order2
+ ' ) AS TMP ' + @new_order1
END
END
IF @SortType = 3 --多列排序，必须包含主键，且放置最后，否则不处理
BEGIN
IF CHARINDEX(',' + @PrimaryKey + ' ',',' + @Order) = 0
BEGIN PRINT('ERR_02') RETURN END
IF @PageIndex <= CEILING((@TotalCount+0.0)/@PageSize)/2 --正向检索
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '
+ 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '
+ ' Select TOP ' + STR(@PageSize*@PageIndex) + ' ' + @FieldList
+ ' FROM ' + @TableName + @new_where1 + @new_order1 + ' ) AS TMP '
+ @new_order2 + ' ) AS TMP ' + @new_order1
END
ELSE --反向检索
BEGIN
SET @Sql = 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '
+ 'Select TOP ' + STR(@PageSize) + ' ' + @FieldList + ' FROM ( '
+ ' Select TOP ' + STR(@TotalCount-@PageSize *@PageIndex+@PageSize) + ' ' + @FieldList
+ ' FROM ' + @TableName + @new_where1 + @new_order2 + ' ) AS TMP '
+ @new_order1 + ' ) AS TMP ' + @new_order1
END
END
END
PRINT(@SQL)
EXEC(@Sql) [/code]

[狼王_]

[Quote=引用 6 楼 zeewendotnet 的回复:]
我现在的做法是这样
create proc getMusicList
@PageIndex int,
@PageLength int,
@Total int output
as
SELECT ROW_NUMBER() OVER(Music.ID) AS rownum,Music.Name
INTO #temp
FROM Music
SELECT @Total=COUNT(*) F……
[/Quote]
这样做的结果是每一次页面跳转都要进行一次总数计算，而这种计算是不必要的，个人建议求总数的方法和求列表的方法分开写，这样的话在数据翻页时就只需调用查询列表的存储过程了。省去了output参数@Total

[pengpeng409]

太牛了。。。我以前做程序时做过。。。现在学习学习。。。。

[哥子谭]

用存储过程@@rowcount系统函数

[whb147]

可以用return 返回

[yuerjiajia]

同意九楼的说法 查询总数和分页查询应该分成两个查询来做