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  • 万能分页存储过程(SQL Server)

    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

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  • 原文地址:https://www.cnblogs.com/zunzunQ/p/11577968.html
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