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LEFT OUTER JOIN Merge Two Row Fields as One Field

Posted on 2008-06-18
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Last Modified: 2012-08-13
I have the following query that connects dattbl_Case with dattbl_Policy

dattbl_Policy sometimes has more then one row. When this occurs I need my query to merge both of the POL_NUM column rows from this table into one POL_MERGED column in one row.

So instead of:
CASE_ID POL_ID
600000   POL_ID A
600000   POL_ID B
I need
CASE_ID POL_ID
600000   POL_ID A
               POL_ID B

Not sure how to go about doing this.
Thanks in advance.

 
SELECT     dattbl_Case.CASE_ID, dattbl_Policy.POL_NUM as POL_MERGED
FROM         dattbl_Case LEFT OUTER JOIN
                      dattbl_Policy ON dattbl_Case.CASE_ID = dattbl_Policy.CASE_ID
WHERE     (dattbl_Case.CASE_STATUS = 2)
ORDER BY dattbl_Case.CASE_ID

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Question by:cbish21577
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Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21816065
what is your database?
this should be done in the client application, that is not really a SQL functionality.
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Author Comment

by:cbish21577
ID: 21816076
SQL 2000
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LVL 143

Accepted Solution

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Guy Hengel [angelIII / a3] earned 500 total points
ID: 21816149
you will need a helper function like this:
CREATE FUNCTION dbo.ConcatPolicyNum(@CaseID int)
RETURNS VARCHAR(8000)
AS
BEGIN
  DECLARE @res VARCHAR(8000)
  SELECT @res = COALESCE(@res + ' ', '') + CAST(POL_NUM AS VARCHAR(20))
    FROM dattbl_Policy
   WHERE Case_ID = @caseID
  RETURN @res
END

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LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21816155
and your query becomes this:
SELECT c.CASE_ID, dbo.ConcatPolicyNum(c.CaseID) as POL_MERGED
  FROM dattbl_Case c
 WHERE c.CASE_STATUS = 2
 ORDER BY c.CASE_ID

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Author Comment

by:cbish21577
ID: 21816170
Thanks angellll, I'll test this out. Much appreciated.


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Author Closing Comment

by:cbish21577
ID: 31468530
Thanks, that worked perfect.
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