SQL Server SQL JOIN 协助答案

【问题标题】：SQL Server SQL JOIN AssistanceSQL Server SQL JOIN 协助
【发布时间】：2010-10-05 16:03:06
【问题描述】：

我的连接不正确，并且还没有找到正确的方法来获取我需要的数据，因为下面的 3 个表（客户、SalesHeader、SalesDetail）我正在尝试获取每行有 1 个客户的行项目以及 GL Acct 4000 中的所有销售明细和 GL Acct 5000 中的所有销售交易的总和。还有更多列，以及我想添加的其他几个 GL 帐户，但我已将其分解为最简单的形式试着让它工作。我在下面提供了模拟数据以及我未能成功处理的 SQL 语句的最新版本。如果有人可以帮助我找出我在此 SQL Select 语句中做错了什么，将不胜感激。

客户

CustID | CustCode
------------------
1      | AAA111
2      | AN8348

SalesHeader

SH_ID |  SH_CustID  | SH_GLACCT
-------------------------------
1     |  1          | 4000
2     |  1          | 5000
3     |  1          | 4000
4     |  2          | 5000

销售详情

SD_ID | SD_HID  | Price
--------------------------
1     | 1       | 100.00
2     | 1       | 540.00
3     | 2       | 100.00
4     | 3       | 600.00
5     | 4       | 50.00
6     | 4       | 75.00

所需的输出

地毯 = 4000 垫 = 5000

CustID | CustCode    | Carpet (Sum all SH_GLACCT = 4000) | PAD (Sum all SH_GLACCT = 5000)
-------------------------------------------------------------------------------------------
1      | AAA111      | 1240.00                           | 100.00
2      | AN8348      | 0.00                              | 125.00

不正确的 SQL（两个金额都超过了应有的值）

SELECT C.CustID, C.CustCode, SUM(ADH.Price) AS Carpet, SUM(APD.Price) As Pad
FROM Customer AS C

LEFT OUTER JOIN SalesHeader AS ACH On C.CustID = ACH.SH_CustID AND ACH.SH_GLACCT = '4000'
LEFT OUTER JOIN SalesDetail AS ADH On ACH.SH_ID = ADH.SD_HID


LEFT OUTER JOIN SalesHeader AS APH On C.CustID = APH.SH_CustID AND APH.SH_GLACCT = '5000'
LEFT OUTER JOIN SalesDetail AS APD On APH.SH_ID = APD.SD_HID


GROUP BY C.CustID, C.CustCode

【问题讨论】：

标签： sql sql-server

【解决方案1】：

试试这个：

   Select c.CustId, c.CustCode
       Sum(Case When h.SH_GLACCT = 4000 Then Price End) Acct4000Total,
       Sum(Case When h.SH_GLACCT = 5000 Then Price End) Acct5000Total
   From Customer c
      Join Salesheader h On h.SH_CustID = c.CustID
      Join SalesDetail d On d.SD_HID = h.SH_ID
   Where h.SH_GLACCT In (4000, 5000)
   Group By c.CustId

如果您想列出没有销售的客户，请使用外连接：

   Select c.CustId, c.CustCode
       Sum(Case When h.SH_GLACCT = 4000 Then Price End) Acct4000Total,
       Sum(Case When h.SH_GLACCT = 5000 Then Price End) Acct5000Total
   From Customer c
      Left Join (Salesheader h Join SalesDetail d 
                   On d.SD_HID = h.SH_ID
                       And h.SH_GLACCT In (4000, 5000))
          On h.SH_CustID = c.CustID
   Group By c.CustId

【讨论】：

【解决方案2】：

尝试以下方法：

SELECT  c.CustID
    ,   c.CustCode
    ,   Carpet  = SUM(CASE WHEN sh.SH_GLACCT = 4000 THEN sd.Price ELSE 0 END)
    ,   Pad     = SUM(CASE WHEN sh.SH_GLACCT = 5000 THEN sd.Price ELSE 0 END)
FROM    Customer c
    LEFT JOIN
        SalesHeader sh
    ON c.CustID = sh.CustID

    LEFT JOIN 
        SalesDetail sd
    ON  sh.sh_id = sd.sd_hid
GROUP   BY
        c.CustID
    ,   c.CustCode

【讨论】：

【解决方案3】：

您可以为此使用 PIVOT 运算符：

SELECT CustID, CustCode, SUM([4000]) Carpet, SUM([5000]) PAD
FROM Cust c
JOIN SalesHeader sh ON c.CustID = sh.SH_CustID
JOIN SalesDetail sd ON sh.SH_ID = sd.SD_HID
PIVOT (
    SUM(sd.Price)
    FOR sh.SH_GLACCT IN ([4000],[5000])
) AS pt
GROUP BY CustID, CustCode

【讨论】：

【解决方案4】：

SELECT C.CustID, C.CustCode, SH_GLACCT, SUM(Price) AS sum_price
FROM Customer  C
INNER JOIN SalesHeader sh On C.CustID = sH.SH_CustID 
LEFT OUTER JOIN SalesDetail sd On sh.SH_ID = sd.SD_HID

WHERE
SH_GLACCT in(4000,5000)

GROUP BY CustID, CustCode, SH_GLACCT

【讨论】：