SQL Server DISTINCT或GROUP BY与临时表

我有一个复杂的问题。我的想法是，我需要一个不同于表的Serv_Acct（这很简单，我已经有了）：

运行此命令时，我得到16行：

SERV_ACCT   (No column name)
0289S61288  2013-06-12 00:00:00.000
0492S90281  2013-06-12 00:00:00.000
1303S90280  2013-06-12 00:00:00.000
1435S01282  2013-06-12 00:00:00.000
1440S13289  2013-06-24 00:00:00.000
1548S00286  2013-06-12 00:00:00.000
2498S21288  2013-06-12 00:00:00.000
5384S92284  2013-06-24 00:00:00.000
5538S21284  2013-06-12 00:00:00.000
6109S12286  2013-06-12 00:00:00.000
7358S00281  2013-06-12 00:00:00.000
7488S22289  2013-06-12 00:00:00.000
8058S12287  2013-06-12 00:00:00.000
9058S00288  2013-06-12 00:00:00.000
9168S00282  2013-06-12 00:00:00.000
9645S21281  2013-06-12 00:00:00.000

现在，我没有得到的部分是，每个服务帐户都有一个帐号，有些服务帐户有多个帐号，我只想要一个帐号的服务帐户，这个帐号是从最新的日期开始的。当我尝试这样做时，请查看问题：

DECLARE 

 @CustomerID int = 8,
 @UtilityCompanyID int = 1


    SELECT DISTINCT SERV_ACCT, ACCOUNT, MAX(INV_DATE)
    FROM tblAPSData

    WHERE SERV_ACCT NOT IN (SELECT ServiceAccount
                FROM tblMEP_Meters
                JOIN tblMEP_Sites
                ON tblMEP_Meters.SiteID = tblMEP_Sites.ID

                JOIN tblMEP_Projects
                ON tblMEP_Projects.ID = tblMEP_Sites.ProjectID

                WHERE CustomerID = 8
                AND Type = 1
                )

    AND ACCOUNT IN (SELECT AccountNumber
                    FROM tblMEP_CustomerAccounts
                    WHERE CustomerID = @CustomerID
                    AND UtilityCompanyID = @UtilityCompanyID)

    AND INV_DATE > DATEADD(month, -6, getdate())
    GROUP BY SERV_ACCT, ACCOUNT
    ORDER BY SERV_ACCT

现在，结果如下：

SERV_ACCT   ACCOUNT (No column name)
0289S61288  117512280   2013-06-12 00:00:00.000
0492S90281  117512280   2013-06-12 00:00:00.000
0492S90281  651412281   2013-04-08 00:00:00.000
1303S90280  117512280   2013-06-12 00:00:00.000
1435S01282  117512280   2013-06-12 00:00:00.000
1440S13289  312937281   2013-06-24 00:00:00.000
1548S00286  117512280   2013-06-12 00:00:00.000
1548S00286  308710287   2013-04-08 00:00:00.000
2498S21288  117512280   2013-06-12 00:00:00.000
5384S92284  979437282   2013-06-24 00:00:00.000
5538S21284  117512280   2013-06-12 00:00:00.000
6109S12286  117512280   2013-06-12 00:00:00.000
7358S00281  117512280   2013-06-12 00:00:00.000
7358S00281  659710281   2013-04-08 00:00:00.000
7488S22289  117512280   2013-06-12 00:00:00.000
8058S12287  117512280   2013-06-12 00:00:00.000
9058S00288  117512280   2013-06-12 00:00:00.000
9168S00282  117512280   2013-06-12 00:00:00.000
9168S00282  570810282   2013-04-08 00:00:00.000
9645S21281  117512280   2013-06-12 00:00:00.000

---

正如您所看到的，服务帐户不再是不同的！我的目标是只获取最新帐户的独特服务帐户（16）。有没有关于如何做到这一点的帮助？我问了一个朋友，她告诉我，我可以用临时表来做！这是真的吗

尝试使用列为子查询的第一个查询，并将其加入tblapsdata。它看起来像这样：

DECLARE 

 @CustomerID int = 8,
 @UtilityCompanyID int = 1

SELECT MD.SERV_ACCT, AD.ACCOUNT, MD.MAXINVDATE
FROM
(SELECT DISTINCT SERV_ACCT, MAX(INV_DATE) as MAXINVDATE
FROM tblAPSData

WHERE SERV_ACCT NOT IN (SELECT ServiceAccount
            FROM tblMEP_Meters
            JOIN tblMEP_Sites
            ON tblMEP_Meters.SiteID = tblMEP_Sites.ID

            JOIN tblMEP_Projects
            ON tblMEP_Projects.ID = tblMEP_Sites.ProjectID

            WHERE CustomerID = 8
            AND Type = 1
            )

AND ACCOUNT IN (SELECT AccountNumber
                FROM tblMEP_CustomerAccounts
                WHERE CustomerID = @CustomerID
                AND UtilityCompanyID = @UtilityCompanyID)

AND INV_DATE > DATEADD(month, -6, getdate())
GROUP BY SERV_ACCT) MD
join tblAPSdata AD on MD.SERV_ACCT = AD.SERV_ACCT and MD.MAXINVDATE = AD.INV_DATE

---

请注意，这将仅返回原始查询中的记录，但会附加相应的帐号。请注意，如果您有多个日期相同的帐号，将返回更多记录。

谢谢，迈克！！这正是我要找的，你能告诉我你怎么用临时表吗？再次感谢你。

DECLARE 

 @CustomerID int = 8,
 @UtilityCompanyID int = 1

SELECT MD.SERV_ACCT, AD.ACCOUNT, MD.MAXINVDATE
FROM
(SELECT DISTINCT SERV_ACCT, MAX(INV_DATE) as MAXINVDATE
FROM tblAPSData

WHERE SERV_ACCT NOT IN (SELECT ServiceAccount
            FROM tblMEP_Meters
            JOIN tblMEP_Sites
            ON tblMEP_Meters.SiteID = tblMEP_Sites.ID

            JOIN tblMEP_Projects
            ON tblMEP_Projects.ID = tblMEP_Sites.ProjectID

            WHERE CustomerID = 8
            AND Type = 1
            )

AND ACCOUNT IN (SELECT AccountNumber
                FROM tblMEP_CustomerAccounts
                WHERE CustomerID = @CustomerID
                AND UtilityCompanyID = @UtilityCompanyID)

AND INV_DATE > DATEADD(month, -6, getdate())
GROUP BY SERV_ACCT) MD
join tblAPSdata AD on MD.SERV_ACCT = AD.SERV_ACCT and MD.MAXINVDATE = AD.INV_DATE