万能分页存储过程

if exists(select name from sysobjects where name = 'Proc_Pagination' and type = 'P')

drop proc Proc_Pagination

go

Create PROCEDURE Proc_Pagination

    @tblName varchar(255), -- 表名

    @strGetFields varchar(1000) = '*', -- 需要返回的列

    @fldName varchar(255)='', -- 排序的字段名

    @PageSize int = 10, -- 页尺寸

    @PageIndex int = 1, -- 页码

    @doCount bit = 0, -- 返回记录总数, 非 0 值则返回

    @OrderType bit = 0, -- 设置排序类型, 非 0 值则降序

    @strWhere varchar(1500) = '' -- 查询条件 (注意: 不要加 where)

AS

declare @strSQL varchar(5000) -- 主语句

declare @strTmp varchar(110) -- 临时变量

declare @strOrder varchar(400) -- 排序类型

if @doCount != 0

    begin

        if @strWhere !=''

            set @strSQL = 'select count(*) as Total from [' + @tblName + '] where '+@strWhere

        else

            set @strSQL = 'select count(*) as Total from [' + @tblName + ']'

    end

    --以上代码的意思是如果@doCount传递过来的不是0，就执行总数统计。以下的所有代码都是@doCount为0的情况

else

    begin

        if @OrderType != 0

            begin

                set @strTmp = '<(select min'

                set @strOrder = ' order by [' + @fldName +'] desc'

                --如果@OrderType不是0，就执行降序，这句很重要！

            end

       

        else

            begin

                set @strTmp = '>(select max'

                set @strOrder = ' order by [' + @fldName +'] asc'

            end

            if @PageIndex = 1

                begin

                    if @strWhere != ''

                        set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from [' + @tblName + '] where ' + @strWhere + ' ' + @strOrder

                    else

                        set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from ['+ @tblName + '] '+ @strOrder

                        --如果是第一页就执行以上代码，这样会加快执行速度

                end

            else

                begin

                    --以下代码赋予了@strSQL以真正执行的SQL代码

                    set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from ['

                        + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['+ @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['+ @fldName + '] from [' + @tblName + ']' + @strOrder + ') as tblTmp)'+ @strOrder

                        if @strWhere != ''

                    set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from ['

                        + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['

                        + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['

                        + @fldName + '] from [' + @tblName + '] where ' + @strWhere + ' '

                        + @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder

                            end

       end

exec (@strSQL)

GO