CREATE procedure main_table_pwqzc

(@pagesize int,

@pageindex int,

@docount bit,

@this_id)

as

if(@docount=1)

begin

select count(id) from luntan where

end

else

begin

declare @indextable table(id int identity(1,1),nid int)

declare @PageLowerBound int

declare @PageUpperBound int

set @PageLowerBound=(@pageindex-1)*@pagesize

set @PageUpperBound=@PageLowerBound+@pagesize

set rowcount @PageUpperBound

insert into @indextable(nid) select id from luntan where order by reply_time desc

select a.* from luntan a,@indextable t where a.id=t.nid

and t.id>@PageLowerBound and t.id< order by t.id

end

GO

存储过程会根据传入的参数@docount来确定是不是要返回所有要分页的记录总数

特别是这两行

set rowcount @PageUpperBound

insert into @indextable(nid) select id from luntan where order by reply_time desc

真的是妙不可言!!set rowcount @PageUpperBound当记录数达到@PageUpperBound时就会停止处理查询

,select id 只把id列取出放到临时表里,select a.* from luntan a,@indextable t where a.id=t.nid

and t.id>@PageLowerBound and t.id< order by t.id

而这句也只从表中取出所需要的记录,而不是所有的记录,结合起来,极大的提高了效率!!

妙啊,真的妙!!!!

CREATE PROCEDURE Paging_RowCount

(

@Tables varchar(1000),

@PK varchar(100),

@Sort varchar(200) = NULL,

@PageNumber int = 1,

@PageSize int = 10,

@Fields varchar(1000) = '*',

@Filter varchar(1000) = NULL,

@Group varchar(1000) = NULL)

AS

/*Default Sorting*/

IF @Sort IS NULL OR @Sort = ''

 SET @Sort = @PK

/*Find the @PK type*/

DECLARE @SortTable varchar(100)

DECLARE @SortName varchar(100)

DECLARE @strSortColumn varchar(200)

DECLARE @operator char(2)

DECLARE @type varchar(100)

DECLARE @prec int

/*Set sorting variables.*/

IF CHARINDEX('DESC',@Sort)>0

 BEGIN

  SET @strSortColumn = REPLACE(@Sort, 'DESC', '')

  SET @operator = '<='

 END

ELSE

 BEGIN

  IF CHARINDEX('ASC', @Sort) = 0

   SET @strSortColumn = REPLACE(@Sort, 'ASC', '')

  SET @operator = '>='

 END

IF CHARINDEX('.', @strSortColumn) > 0

 BEGIN

  SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.',@strSortColumn))

  SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.',@strSortColumn) + 1, LEN(@strSortColumn))

 END

ELSE

 BEGIN

  SET @SortTable = @Tables

  SET @SortName = @strSortColumn

 END

SELECT @type=t.name, @prec=c.prec

FROM sysobjects o

JOIN syscolumns c on o.id=c.id

JOIN systypes t on c.xusertype=t.xusertype

WHERE o.name = @SortTable AND c.name = @SortName

IF CHARINDEX('char', @type) > 0

   SET @type = @type + '(' + CAST(@prec AS varchar) + ')'

DECLARE @strPageSize varchar(50)

DECLARE @strStartRow varchar(50)

DECLARE @strFilter varchar(1000)

DECLARE @strSimpleFilter varchar(1000)

DECLARE @strGroup varchar(1000)

/*Default Page Number*/

IF @PageNumber < 1

 SET @PageNumber = 1

/*Set paging variables.*/

SET @strPageSize = CAST(@PageSize AS varchar(50))

SET @strStartRow = CAST(((@PageNumber - 1)*@PageSize + 1) AS varchar(50))

/*Set filter & group variables.*/

IF @Filter IS NOT NULL AND @Filter != ''

 BEGIN

  SET @strFilter = ' WHERE ' + @Filter + ' '

  SET @strSimpleFilter = ' AND ' + @Filter + ' '

 END

ELSE

 BEGIN

  SET @strSimpleFilter = ''

  SET @strFilter = ''

 END

IF @Group IS NOT NULL AND @Group != ''

 SET @strGroup = ' GROUP BY ' + @Group + ' '

ELSE

 SET @strGroup = ''

 

/*Execute dynamic query*/

EXEC(

'

DECLARE @SortColumn ' + @type + '

SET ROWCOUNT ' + @strStartRow + '

SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '

SET ROWCOUNT ' + @strPageSize + '

SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '

'

)

GO