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join

Posted on 2011-09-16
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Last Modified: 2012-06-27
table PX
CID, projectEndDate, memberid, providerid, POs
1, 2011-06-30 23:59:00, 12345, 09876, IP
2, 2012-06-30 25:59:00, 12345, 09876, IP
3, 2011-06-30 24:59:00, 23456, 98765, OP
4, 2011-06-30 23:59:00, 23456, 98765, OP
5, 2011-06-30 23:59:00, 34567, 87654, IP
6, 2011-06-30 23:59:00, 45678, 76543, OP

Table MasterChild contains CID from table PX as master child associations.
MasterCID, ChildCID
2,1
3,4

How do i join the above two tables to show projectEndDate for both MasterCID and ChildCID as follows:
MasterCID, MasterProjectStartDate, ChildCID, ChildProjectStartDate
2, 2012-06-30 25:59:00, 1, 2011-06-30 23:59:00
3, 2011-06-30 24:59:00, 4, 2011-06-30 23:59:00

Thank you.


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Question by:patd1
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8 Comments
 
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Expert Comment

by:tim_cs
ID: 36551388

SELECT
  A.MasterCid
  B.ProjectEndDate
  ,A.ChildCID
  ,C.ProjectEndDate
FROM
   MasterChild A
      INNER JOIN PX B 
         ON A.MasterCID = B.CID
      INNER JOIN PX C
          ON A.ChildCid = C.CID

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Accepted Solution

by:
tim_cs earned 250 total points
ID: 36551399
Missed a comma.
SELECT 
  A.MasterCid 
  ,B.ProjectEndDate 
  ,A.ChildCID 
  ,C.ProjectEndDate 
FROM 
   MasterChild A 
      INNER JOIN PX B  
         ON A.MasterCID = B.CID 
      INNER JOIN PX C 
          ON A.ChildCid = C.CID

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Assisted Solution

by:Haris Djulic
Haris Djulic earned 250 total points
ID: 36551469
select f.MasterCID, e.projectEndDate as projectstartdate, f.ChildCID , g.projectEndDate as enddate       
from (select cid, projectEndDate from PX) as  e
 left join MasterChild  f on e.cid=f.MasterCID
left join (select cid, projectEndDate from PX) as  g on g.cid=f.ChildCID
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LVL 15

Expert Comment

by:Haris Djulic
ID: 36551477
removed the Null joins...


select f.MasterCID, e.projectEndDate as projectstartdate, f.ChildCID , g.projectEndDate as enddate	 
from (select cid, projectEndDate from PX) as  e inner join MasterChild  f on e.cid=f.MasterCID
inner join (select cid, projectEndDate from PX) as  g on g.cid=f.ChildCID

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LVL 15

Expert Comment

by:tim_cs
ID: 36551673
Did mine not work?
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Author Comment

by:patd1
ID: 36551711
oops! I meant to accept multiple solutions, but clicked on the other button by mistake. I tested both and they bot worked. In fact I found your solution to be simpler to understand. I am sorry. I don't know if I can change it to mark both solutions as accepted. Good learning experience. Thanks a ton!
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LVL 15

Expert Comment

by:Haris Djulic
ID: 36558475
Is this question going to be closed?
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