如何從兩個t-sql select中組合兩列？

Question

我正在使用t-sql。 我想用兩個coulmns返回一個dataTable：A，B

但是'union'不是這樣。我應該使用什麼語法？

select Params as A 
from Table1 
where ID = '1' 

union 

select Params as B 
from Table1 
where ID = '2' 

更新：很抱歉，我有一個錯字：@CITD => ID

TIA

Answer 1

select T1.Params as A, T2.Params as B 
from Table1 T1 
INNER JOIN Table1 T2 ON @CTID = '1' AND @ID = '2' 

希望這有助於。

Answer 2

不知道如何A和B涉及其不可能創造一個合乎邏輯的結果集既沒有A或B等於NULL一個記錄。

下面會給你1個結果2列設置，但將需要。如果你希望他們是如何關聯的詳細信息「合併」更多：

select Params as A, NULL as B 
from Table1 
where @CTID = '1' 

union 

select NULL as A, Params as B 
from Table1 
where @ID = '2' 

Answer 3

SELECT 
    MAX(CASE ID WHEN '1' THEN Params END) AS A, 
    MAX(CASE ID WHEN '2' THEN Params END) AS B 
FROM Table1 
WHERE ID IN ('1', '2')