据说很快的数据库分页存储过程

全栈程序员-站长 • 2021年5月4日下午6:00 • 未分类 • 阅读 118

create procedure SqlDataPaging
@tbName varchar(255),        --表名
@tbFields varchar(1000),      --返回字段
@OrderField varchar(255),   --排序的字段名
@PageSize int,                 --页尺寸
@PageIndex int,                --页码
@OrderType bit,                --排序类型,1是升序,0是降序
@strWhere varchar(1500),    --查询条件
@Total int output            --返回总记录数
as
declare @strSql varchar(5000)     --主语句
declare @strOrder varchar(200)    --排序
declare @strSqlCount nvarchar(500)--查询记录总数主语句
declare @strtemp varchar(50)      --排序附加语句
--------------排序-----------------1是降序,0未升序
if @OrderType !=0
    begin
        set @strtemp= '>(select max('
        set @strOrder='order by ' + @OrderField + ' asc '
    end
else
    begin
        set @strtemp= '<(select min('
        set @strOrder='order by '+ @OrderField + ' desc'
    end
--------------总记录数---------------
if @strWhere !=''
    begin
        set @strSqlCount='Select @TotalCout=count(*) from  ' + @tbName + 'where  '+ @strWhere
    end
else
    begin
        set @strSqlCount='Select @TotalCout=count(*) from  ' + @tbName
    end
--------------如果是第一页------------
if @PageIndex =1
    begin
        if @strWhere !=''
            begin
                set @strSql = 'Select top' +str(@PageSize)+ ' ' + @tbFields + '  from '+ @tbName +' where ' + @strWhere + ' ' + @strOrder
            end
        else
            begin
                set @strSql = 'Select top' +str(@PageSize)+ ' ' + @tbFields + '  from '+ @tbName + ' ' + @strOrder
            end
    end
else
    begin
        if @strWhere !=''
            begin
                set @strSql='Select top ' +str(@PageSize) + ' ' + @tbFields 
                            +' from ' + @tbName + ' where '+@OrderField +' '
                            + @strtemp+ ' ' +@OrderField+ ') from (select top'
                            +str((@PageIndex-1)*@PageSize) + ' '+@OrderField +' from '+@tbName
                            + @strWhere+ ' '+ @strOrder +') as tb)'+ @strOrder
            end
        else
            begin
                set @strSql='Select top ' + str(@PageSize) + ' ' + @tbFields 
                            +' from ' + @tbName + ' where '+@OrderField + ' '
                            + @strtemp+ ' ' +@OrderField+ ') from (select top'
                            +str((@PageIndex-1)*@PageSize) + ' '+@OrderField +' from '+@tbName 
                            + ' '+ @strOrder +') as tb)'+ @strOrder
            end
    end
exec sp_executesql @strSqlCount,N'@TotalCout int output',@Total output
exec(@strSql)