SQL查詢 - 確定誰只有一個禮物記錄

Question

我想知道我怎麼能有一羣人最初選擇中編寫一個SQL腳本，這樣一：

SELECT [RECORDS].[CONSTITUENT_ID] 
    ,[RECORDS].[FIRST_NAME] 
    ,[RECORDS].[LAST_NAME] 
    ,[DATEADDED] 
    ,[DTE] 
    ,[Amount] 
    ,[REF] 
    ,[TYPE] 
FROM [re7].[dbo].[GIFT] 
INNER JOIN [re7].[dbo].[RECORDS] 
ON GIFT.CONSTIT_ID LIKE RECORDS.ID 
WHERE ([DTE] BETWEEN '2/7/2015' AND '2/8/2015') 
ORDER BY [DATEADDED] DESC 

只選擇個人誰是「第一時間捐助者」（或誰只有一個禮物[RE7] [DBO]。[禮物]。

[RECORDS]是所有成分表。

[禮物]是所有的表錄音禮品

上述查詢的輸出，僅僅是一個表： CONSTITUENT_ID，名字，姓氏，DATEADDED，DTE，金額，樓盤，TYPE

我非常希望看到相同的輸出格式，但我想在[re7]中查詢僅選擇只有1個GIFT（按他們的記錄ID）的CONSTITUENT_ID [dbo]。[GIFT]。

對於缺乏顯示的數據，我表示歉意。我希望我可以更好地描述....

Answer 1

SELECT [RECORDS].[CONSTITUENT_ID] 
    ,[RECORDS].[FIRST_NAME] 
    ,[RECORDS].[LAST_NAME] 
    ,[DATEADDED] 
    ,[DTE] 
    ,[Amount] 
    ,[REF] 
    ,[TYPE] 
FROM [re7].[dbo].[GIFT] 
INNER JOIN [re7].[dbo].[RECORDS] 
ON GIFT.CONSTIT_ID LIKE RECORDS.ID 
WHERE ([DTE] BETWEEN '2/7/2015' AND '2/8/2015') 
    AND GIFT.CONSTIT_ID IN (
     SELECT CONSTIT_ID FROM re7.dbo.Gift GROUP BY CONSTIT_ID HAVING COUNT(*) = 1 
    ) /* another option is to add a subquery to the query you already had */ 
ORDER BY [DATEADDED] DESC 

Answer 2

該解決方案只是簡單地選擇所有隻做過一次捐贈並隨後加入的成分，從而限制了結果集。

SELECT 
    r.[CONSTITUENT_ID] 
    ,r.[FIRST_NAME] 
    ,r.[LAST_NAME] 
    ,[DATEADDED] 
    ,[DTE] 
    ,[Amount] 
    ,[REF] 
    ,[TYPE] 
FROM 
    (select [CONSTIT_ID] from [re7].[dbo].[GIFT] group by [CONSTIT_ID] having count([CONSTIT_ID]) = 1) g1 
    inner join [re7].[dbo].[GIFT] g 
     on g.[CONSTIT_ID] = g1.[CONSTIT_ID] 
    INNER JOIN [re7].[dbo].[RECORDS] r 
     ON g.CONSTIT_ID LIKE r.RECORDS.ID 
WHERE ([DTE] BETWEEN '2/7/2015' AND '2/8/2015') 
ORDER BY [DATEADDED] DESC