如何在SQL Server中的运行时添加额外的列

Question

我的查询是

SELECT  
   RemainingQty, CompletedQty 
FROM 
   tblJobStatus AS JT 
LEFT OUTER JOIN 
   TBLJOBWORKS  AS TJ ON JobWorksId = TaskId 
LEFT OUTER JOIN 
   tblTotalJob AS T ON T.Id = JobID    
WHERE 
   JT.ProductID = '28' 
   AND ItemId = '15' 
ORDER BY 
   JobSequence ASC

执行查询时，我得到了这个结果

现在我想在运行时添加一个额外的列，其中包含状态。如果RemainingQty为0且CompletedQty大于0，则状态列将包含完整的其他待处理项。

如下图所示

没有循环可以吗？

Answer 1

当然，没问题 - 这是一个非常简单的CASE表达式：

SELECT  
   RemainingQty, CompletedQty,
   Status = CASE
               WHEN RemainingQy = 0 AND CompletedQty > 0
                 THEN 'Complete'
                 ELSE 'Pending'
            END
FROM 
   tblJobStatus AS JT 
LEFT OUTER JOIN 
   TBLJOBWORKS  AS TJ ON JobWorksId = TaskId 
LEFT OUTER JOIN 
   tblTotalJob AS T ON T.Id = JobID    
WHERE 
   JT.ProductID = '28' 
   AND ItemId = '15' 
ORDER BY 
   JobSequence ASC

Answer 2

select
    ...,
    case
       when RemainingQty = 0 and CompletedQty > 0 then 'Complete'
       else 'Pending'
    end as Status
from ...

Answer 3

SELECT  
   RemainingQty, CompletedQty,
   case when RamaininQty = and CompletedQty > 0 then 'Complete' else 'Pending' end as Status
FROM 
   tblJobStatus AS JT 
LEFT OUTER JOIN 
   TBLJOBWORKS  AS TJ ON JobWorksId = TaskId 
LEFT OUTER JOIN 
   tblTotalJob AS T ON T.Id = JobID    
WHERE 
   JT.ProductID = '28' 
   AND ItemId = '15' 
ORDER BY 
   JobSequence ASC

Answer 4

SELECT  
   RemainingQty, CompletedQty,
   Case when RemainingQty=0 and  CompletedQty>0 then 'Complete' else 'Pending' end as Status
FROM 
   tblJobStatus AS JT 
LEFT OUTER JOIN 
   TBLJOBWORKS  AS TJ ON JobWorksId = TaskId 
LEFT OUTER JOIN 
   tblTotalJob AS T ON T.Id = JobID    
WHERE 
   JT.ProductID = '28' 
   AND ItemId = '15' 
ORDER BY 
   JobSequence ASC