功能不错的分页存储过程，可支持多表查询，任意排序

CREATE PROCEDURE usp_PagingLarge


@TableNames VARCHAR(200), --表名，可以是多个表，但不能用别名


@PrimaryKey VARCHAR(100), --主键，可以为空，但@Order为空时该值不能为空


@Fields VARCHAR(200), --要取出的字段，可以是多个表的字段，可以为空，为空表示select *


@PageSize INT, --每页记录数


@CurrentPage INT, --当前页，0表示第1页


@Filter VARCHAR(200) = '', --条件，可以为空，不用填 where


@Group VARCHAR(200) = '', --分组依据，可以为空，不用填 group by


@Order VARCHAR(200) = '' --排序，可以为空，为空默认按主键升序排列，不用填 order by


AS


BEGIN


DECLARE @SortColumn VARCHAR(200)


DECLARE @Operator CHAR(2)


DECLARE @SortTable VARCHAR(200)


DECLARE @SortName VARCHAR(200)


IF @Fields = ''


SET @Fields = '*'


IF @Filter = ''


SET @Filter = 'WHERE 1=1'


ELSE


SET @Filter = 'WHERE ' + @Filter


IF @Group <>''


SET @Group = 'GROUP BY ' + @Group




IF @Order <> ''


BEGIN


DECLARE @pos1 INT, @pos2 INT


SET @Order = REPLACE(REPLACE(@Order, ' asc', ' ASC'), ' desc', ' DESC')


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


IF CHARINDEX(' ASC', @Order) > 0


BEGIN


IF CHARINDEX(' DESC', @Order) < CHARINDEX(' ASC', @Order)


SET @Operator = '<='


ELSE


SET @Operator = '>='


END


ELSE


SET @Operator = '<='


ELSE


SET @Operator = '>='


SET @SortColumn = REPLACE(REPLACE(REPLACE(@Order, ' ASC', ''), ' DESC', ''), ' ', '')


SET @pos1 = CHARINDEX(',', @SortColumn)


IF @pos1 > 0


SET @SortColumn = SUBSTRING(@SortColumn, 1, @pos1-1)


SET @pos2 = CHARINDEX('.', @SortColumn)


IF @pos2 > 0


BEGIN


SET @SortTable = SUBSTRING(@SortColumn, 1, @pos2-1)


IF @pos1 > 0


SET @SortName = SUBSTRING(@SortColumn, @pos2+1, @pos1-@pos2-1)


ELSE


SET @SortName = SUBSTRING(@SortColumn, @pos2+1, LEN(@SortColumn)-@pos2)


END


ELSE


BEGIN


SET @SortTable = @TableNames


SET @SortName = @SortColumn


END


END


ELSE


BEGIN


SET @SortColumn = @PrimaryKey


SET @SortTable = @TableNames


SET @SortName = @SortColumn


SET @Order = @SortColumn


SET @Operator = '>='


END




DECLARE @type varchar(50)


DECLARE @prec int


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 @TopRows INT


SET @TopRows = @PageSize * @CurrentPage + 1


print @TopRows


print @Operator


EXEC('


DECLARE @SortColumnBegin ' + @type + '


SET ROWCOUNT ' + @TopRows + '


SELECT @SortColumnBegin=' + @SortColumn + ' FROM ' + @TableNames + ' ' + @Filter + ' ' + @Group + ' ORDER BY ' + @Order + '


SET ROWCOUNT ' + @PageSize + '


SELECT ' + @Fields + ' FROM ' + @TableNames + ' ' + @Filter + ' AND ' + @SortColumn + '' + @Operator + '@SortColumnBegin ' + @Group + ' ORDER BY ' + @Order + '


')


END




GO




--调用例子：


--1.单表/单排序


EXEC usp_PagingLarge 'bigtable','d_id','d_id,d_title,d_content,d_time',20,1,'','','d_id desc'


--2.单表/多排序


EXEC usp_PagingLarge 'bigtable','d_id','*',20,0,'','','d_time asc,d_id desc'


--3.多表/单排序


EXEC usp_PagingLarge 'bigtable left join bigtable_author on bigtable.d_id=bigtable_author.BigTable_id', 'bigtable.d_id', 'bigtable.d_id,bigtable.d_title,bigtable.d_content,bigtable.d_time,bigtable_author.d_author', 20, 0, '', '', 'bigtable.d_id asc'


--4.多表/多排序


EXEC usp_PagingLarge 'bigtable left join bigtable_author on bigtable.d_id=bigtable_author.BigTable_id', 'bigtable.d_id', 'bigtable.d_id,bigtable.d_title,bigtable.d_content,bigtable.d_time,bigtable_author.d_author', 20, 0, '', '', 'bigtable.d_time asc,bigtable.d_id desc'