SQL查詢COMBIN從同一個表中的結果

Question

我有表客戶（ID，姓名）手機（ID，客戶ID，PHONETYPE，電話） 是posssible編寫返回行這樣的查詢：

客戶編號，客戶名稱，電話1，電話2，Mobile1，移動電話2

電話1，電話2，Mobile1，移動電話2的電話類型

我試圖

select id as CustomerId, name as CustomerName, phone as Phone1 
from Customers, Phones 
where Customers.id = Phones.customerId and 
Phones.phoneType = N'Phone1' 

Answer 1

使用pivot

select * 
from (select id as customerid, name as customername, phonetype, phone 
    from customers inner join phones on customers.id = phones.customerid 
) src 
pivot 
(max(phone) for phonetype in ([phone1],[phone2],[mobile1],[mobile2])) p