返回值列名

Question

下面的存儲過程按預期正常工作。如果存在「FleetBarcode」，則返回True，否則返回False。

然而，當它返回它，它顯示爲以下

(no column name) 
    True 

我的問題是我需要「無列名」部分有一個定義的列名。嘗試了下面的方法，它給出了'真'字段的別名。

謝謝你的時間。

ALTER proc [dbo].[usp_getjobs] 

@barcode as nvarchar(20) 


as 
SELECT CASE WHEN EXISTS(
SELECT 
[FleetBarcode], 
[Deleted] 

FROM w_DeliveryItems 


WHERE FleetBarcode = @barcode 
AND Deleted != 1 
) 
THEN (SELECT 'True' 'Exist') 
ELSE (SELECT 'False' 'Exist') 


END 

Answer 1

使用

ALTER PROC [dbo].[usp_getjobs] @barcode AS NVARCHAR(20) 
AS 
    SELECT CASE 
      WHEN EXISTS(SELECT [FleetBarcode], 
           [Deleted] 
         FROM w_DeliveryItems 
         WHERE FleetBarcode = @barcode 
           AND Deleted != 1) THEN 'True' 
      ELSE 'False' 
      END AS [Exist] 

別名需要去外SELECT。

對於列別名，使用方括號比單引號更常見。

Answer 2

獲得的THEN/ELSE塊，如果SELECT小號去掉，用AS給列了個名字：

SELECT CASE WHEN EXISTS(
... 
THEN 'True') 
ELSE 'False') 
END AS [Exist] --<-- add name here 

Answer 3

ALTER proc [dbo].[usp_getjobs] 

@barcode as nvarchar(20) 


as 
SELECT CASE WHEN EXISTS(
SELECT 
[FleetBarcode], 
[Deleted] 

FROM w_DeliveryItems 


WHERE FleetBarcode = @barcode 
AND Deleted != 1 
) 
THEN (SELECT 'True' 'Exist') 
ELSE (SELECT 'False' 'Exist') 


END AS [Your Column Name]