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在这里，我试图创建一个动态查询，但它给出了错误：

CREATE PROCEDURE SP_GetProductsbySales12
@top int,
@all bit,
@orderby nvarchar(20),
@orderdir nvarchar(30) 
as
begin

declare @sql nvarchar(2000)

set @sql = ('SELECT a.skucode,a.productCode,a.productName,a.totalOrder FROM 
    ( select top ')+cast(@top as nvarchar(50))+('  tblProducts.skuCode,tblProducts.productCode, tblProducts.productName, COUNT(tblOrders_Products.delivered) as totalOrder
 FROM         tblOrders_Products INNER JOIN 
                       tblProducts ON tblOrders_Products.productID = tblProducts.productID
 WHERE tblProducts.productName is not null
 GROUP BY tblOrders_Products.delivered, tblOrders_Products.productID, tblProducts.skuCode, tblProducts.productName,tblProducts.productCode
 ORDER BY totalOrder desc,tblProducts.skuCode  ) a
 ORDER BY case when  @orderdir = ''a'' and @orderby=''skucode'' then a.skuCode  end  , 
           case when  @orderdir = ''d'' and @orderby=''skucode'' then a.skuCode  end desc,

           case when  @orderdir = ''a'' and @orderby=''qty'' then a.totalOrder end,
          case when  @orderdir = ''a'' and @orderby=''qty'' then a.skuCode  end,
           case when  @orderdir = ''d'' and @orderby=''qty'' then a.totalOrder end desc,
          case when  @orderdir = ''d'' and @orderby=''qty'' then a.skuCode  end desc')
exec (@sql)


end
GO

我收到的错误是

服务器：消息 137，级别 15，状态 2，第 8 行 必须声明变量“@orderdir”。

为什么即使声明了@orderdir，我也会得到这个？

4

1 回答 1

4

用于sp_executesql传入你的变量。

http://msdn.microsoft.com/en-us/library/ms188001.aspx

exec sp_executesql @sql,
                   N'@orderdir nvarchar(30)',
                   @orderdir=@orderdir
于 2013-03-04T05:18:24.580 回答