TSQL条件联接&；参考表维度

我试图找出一个销售机会在5个不同阶段中的每一个阶段持续多长时间。问题在于salesforce中的数据扁平化。目前的结构如下：

表：历史

TaskID | OppID | STAGE | IQ | DISCO | TECH | COMMERCIAL | CLOSE
  1     Op1       IQ       5     0      0        0          0
  2     Op1       DISCO    0     10     0        0          0
  3     Op1       TECH     0     0      15       0          0
  4     Op1       COMM     0     0      0        5          0
  5     Op2       IQ       2     0      0        0          0  
  6     Op2       CLOSE    0     0      0        0          3
  7     Op3       IQ       3     0      0        0          0

上表有~417k行。仅创建了49k个个人Opportunity，因此49k是我的表的目标行数

我试过下面的连接。我觉得好像我在1码线上，只需要推一下

下面是一张有39M行的表格

SELECT a.OpportunityID, b.IQ, c.Disco, d.Tech, e.Commercial, f.Close
FROM OppHistory a
  JOIN OppHistory b ON a.OppID = b.OppID
  JOIN OppHistory c ON b.OppID = c.OppID
  JOIN OppHistory d ON c.OppID = d.OppID
  JOIN OppHistory e ON d.OppID = e.OppID
  JOIN OppHistory f ON e.OppID = f.OppID

下表给出了一个约50k行的表格，但是，只包含了一些精选的机会，每个OppID都会重复500次左右

SELECT DISTINCT a.OpportunityID, b.IQ, c.Disco, d.Tech, e.Commercial, 
f.Close
FROM OppHistory a
  JOIN OppHistory b ON a.OppID = b.OppID
  JOIN OppHistory c ON b.OppID = c.OppID
  JOIN OppHistory d ON c.OppID = d.OppID
  JOIN OppHistory e ON d.OppID = e.OppID
  JOIN OppHistory f ON e.OppID = f.OppID

下表中给出了0个结果

SELECT b.OppID, Duration AS IQDuration, Duration AS DiscoDuration, 
Duration AS TEDuration, Duration AS CommercialsDuration, Duration AS 
ClosedDuration
FROM OppHistory b,( 
    SELECT q.IQ AS Duration FROM OppHistory q
     UNION
    SELECT d.Disco AS Duration FROM OppHistory d
     UNION
    SELECT t.Tech AS Duration FROM OppHistory t
     UNION
    SELECT c.Comm AS Duration FROM OppHistory c
     UNION
    SELECT l.Closed AS Duration FROM OppHistory l
    )a

我需要的是在单独的列中列出每个阶段的持续时间，以获得不同的机会：

OppID |IQ | Disco | TechEval | Commercial | Close
 Op1    5     10       15         5          0
 Op2    2     0        0          0          3
 Op3    3     0        0          0          0

---

我想你在追求这个：

SELECT OppID, SUM(IQ) AS IQ, SUM(Disco) AS Disco, SUM(Tech) AS Tech, SUM(Commercial) AS Commercial, SUM(Close) AS Close
FROM OppHistory
GROUP BY OppID

---

我想你在追求这个：

SELECT OppID, SUM(IQ) AS IQ, SUM(Disco) AS Disco, SUM(Tech) AS Tech, SUM(Commercial) AS Commercial, SUM(Close) AS Close
FROM OppHistory
GROUP BY OppID

---

这不仅仅是一个简单的分组查询吗？这不仅仅是一个简单的分组查询吗？谢谢Barney-这很有效。看起来我想得太多了汉克斯·巴尼-这很有效。看来我想得太多了