如何從tsql使用case返回true或false

Question

我試圖根據CASE WHEN THEN tsql語句返回true或false，但是唯一出現在結果面板中的是列名「IsGeneric 」。

我哪裏錯了？

alter proc Storefront.proc_IsProjectGeneric 

@ProjectID INT 
AS 
SET NOCOUNT ON; 

SELECT 'IsGeneric'=CASE WHEN p.[GenericCatalogID] > 0 THEN CAST(1 AS BIT) ELSE CAST(0 AS BIT) END 
       FROM Storefront.Project p WITH(NOLOCK) 
       WHERE p.ID = @ProjectID; 

SET NOCOUNT OFF; 

Answer 1

您正在使用周圍的標識符，這使它成爲一個字符串，而不是單引號。

SELECT IsGeneric = CASE WHEN p.[GenericCatalogID] > 0 THEN CAST(1 AS BIT) ELSE CAST(0 AS BIT) END 
      FROM Storefront.Project p WITH(NOLOCK) 
      WHERE p.ID = @ProjectID; 

Answer 2

SELECT CASE WHEN p.[GenericCatalogID] > 0 
      THEN CAST(1 AS BIT) 
      ELSE CAST(0 AS BIT) 
     END as IsGeneric