返回多個值的MS SQL Server子查詢（字符串）

Question

我遇到問題，它將給出字符串結果的子查詢結果連接起來。

其實我的子查詢有一個CASE WHEN語句和列表函數在MS SQL服務器中不起作用。所以我需要以某種方式連接這個子查詢的結果，以便結果在一行中可見。

這裏是我的代碼如下所示：

select 
.......,(select CASE WHEN pm.PaymentType = 1 THEN 'Cash'  
        WHEN pm.PaymentType = 2 THEN 'Check'  
        WHEN pm.PaymentType = 3 THEN 'Credit Card' 
        ELSE 'Money Order' 
       END 
      from 
      <some tables with all the joins> 
      where 
      <all the conditions>) AS [PAYMENT TYPE], 
....... 
from 
<some more tables with joins> 
where 
<some other conditions> 

感謝您的幫助！

Answer 1

一個所述的方法，我知道（也可能是最簡單的你）是XML的絕招：

select 
......., 
    stuff(
      (
      select 
       ',' + 
       CASE 
        WHEN pm.PaymentType = 1 THEN 'Cash'  
        WHEN pm.PaymentType = 2 THEN 'Check'  
        WHEN pm.PaymentType = 3 THEN 'Credit Card' 
        ELSE 'Money Order' 
       END 
      from <some tables with all the joins> 
      where <all the conditions> 
      for xml path(''), type 
     ).value('.', 'varchar(max)') 
    ,1,1,'') AS [PAYMENT TYPE] 
....... 
from 
<some more tables with joins> 
where 
<some other conditions>