显示不存在的列的值

Question

在Oracle中，我可以为表中不存在的列定义值，例如

SELECT 
    C.CUSTOMER_ID, ' ' CUSTOMER_PHONE , 'JAMAICAN' CUSTOMER_NATIONALITY.

我需要知道我是否可以在SQL Server中实现相同的目标。

Answer 1

是的，非常相似...

SELECT 
    C.CUSTOMER_ID, 
    ,CUSTOMER_PHONE = ' ' 
    ,CUSTOMER_NATIONALITY = 'JAMAICAN' 
FROM
   YourTable

您还将看到此列的别名为AS。

SELECT 
    C.CUSTOMER_ID, 
    ,' ' AS CUSTOMER_PHONE  
    ,'JAMAICAN' AS CUSTOMER_NATIONALITY  
FROM
   YourTable