使用计算数据列获取分页排序结果的存储过程答案

【问题标题】：Stored procedure to get paged sorted results with a computed data column使用计算数据列获取分页排序结果的存储过程
【发布时间】：2012-03-06 20:44:09
【问题描述】：

我想创建一个存储过程来获得分页排序的结果，但这是一个转折点。我必须添加一列并用计算/计算的数据填充它。目前我有

ALTER proc [dbo].[pr_GetPagedSortedOrdersByUser]      
(
 @userid numeric(18,0),              
 @CurrentPage int,              
 @PageSize int,            
 @SortField varchar(200),            
 @SortOrder varchar(5),        
 @status varchar(50)        
)              
as              
begin              
with temp as              
  (              
   select * 
    ,ROW_NUMBER() OVER (order by            
        CASE WHEN @SortField = 'orderdate' AND @SortOrder = 'Desc' THEN orderdate END DESC,            
        CASE WHEN @SortField = 'orderdate' THEN orderdate END,      
        CASE WHEN @SortField = 'netamount' AND @SortOrder = 'Desc' THEN netamount END DESC,            
        CASE WHEN @SortField = 'netamount' THEN netamount END,      
        CASE WHEN @SortField = 'id' AND @SortOrder = 'Desc' THEN id END DESC,            
        CASE WHEN @SortField = 'id' THEN id END                       
       ) AS ROWID              
   from tbOrder    
   where (@status='All' or delivered=@status)and userid=@userid

  )              
  select * ,
  (
    netamount - discount
  ) as 'Gross'     
   from temp             
  where rowid>((@CurrentPage - 1) * @PageSize) and rowid <(@CurrentPage * @PageSize + 1)              

  select count(*) as [count]            
   from tbOrder    
   where (delivered=@status or @status='All')and userid=@userid       
end

注意： Gross 列不存在于数据库中，我应该能够将值 Gross 传递给 @SortField

【问题讨论】：

标签： sql sql-server-2008 search sorting stored-procedures

【解决方案1】：

您应该能够将您的计算列添加到您的案例语句中以对其进行排序：

select * 
    ,ROW_NUMBER() OVER (order by            
        CASE WHEN @SortField = 'orderdate' AND @SortOrder = 'Desc' THEN orderdate END DESC,            
        CASE WHEN @SortField = 'orderdate' THEN orderdate END,      
        CASE WHEN @SortField = 'netamount' AND @SortOrder = 'Desc' THEN netamount END DESC,            
        CASE WHEN @SortField = 'netamount' THEN netamount END,      
        CASE WHEN @SortField = 'id' AND @SortOrder = 'Desc' THEN id END DESC,            
        CASE WHEN @SortField = 'id' THEN id END,
        CASE WHEN @SortField = 'gross' AND @SortOrder = 'Desc' THEN netamount - discount END DESC,            
        CASE WHEN @SortField = 'gross' THEN netamount - discount END   
       ) AS ROWID              
   from tbOrder

【讨论】：