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Compound Field Expression in Query is BLANK

Posted on 2003-12-03
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Last Modified: 2012-08-14
I use the following query to run a report in my database:

*****************************************************
SELECT TBL_CASE.CID,
    TBL_PLAINTIFF.PLNAME + ', ' + TBL_PLAINTIFF.PFNAME + ' ' + TBL_PLAINTIFF.PMI
     + ' ' + TBL_PLAINTIFF.Sufix AS pltFull, TBL_PLAINTIFF.SSN,
    TBL_PLAINTIFF.DOB, TBL_PLAINTIFF.DOD,
    TBL_PLAINTIFF.PADDRESS, TBL_PLAINTIFF.AKA,
    TBL_PLAINTIFF.diagnosis, TBL_CASE.[CAUSE NUMBER],
    TBL_CASE.[STYLE PLAINTIFF],
    TBL_CASE.[STYLE DEFENDANT], TBL_CASE.COURT,
    TBL_COUNTY.COUNTY, TBL_PLAINTIFF.[Pltf ID],
    TBL_PLAINTIFF.Occupation, TBL_CASE.comments,
    TBL_PLAINTIFF.[work site], TBL_PLAINTIFF.Settled,
    TBL_PLAINTIFF.[DE comments]
FROM dbo.TBL_CASE INNER JOIN
    dbo.[TBL_PETITION OF ENTRY] ON
    dbo.TBL_CASE.CID = dbo.[TBL_PETITION OF ENTRY].CID INNER
     JOIN
    dbo.TBL_PLAINTIFF ON
    dbo.[TBL_PETITION OF ENTRY].PID = dbo.TBL_PLAINTIFF.PID INNER
     JOIN
    dbo.TBL_COUNTY ON
    dbo.TBL_CASE.CNTYID = dbo.TBL_COUNTY.CNTYID
*****************************************************

The query column in question is the expression which creates the [pltFull] column.  It combines the first, middle, last name and suffix fields to display an individual's full name as "Doe, John A. Jr." etc....  What I have found, however, is if ALL FOUR component fields to this expression are not populated, then NO value is returned.

My question is what is the quickest and most efficient method to have the query return full names, even if the middle initial field or suffix field is not populated?
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Question by:FunkiNATEr
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Accepted Solution

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PaulBarbin earned 500 total points
ID: 9872608
Typically first and last are required, so you might not need it on all columns.
Use the ISNULL method:

TBL_PLAINTIFF.PLNAME + ', ' + TBL_PLAINTIFF.PFNAME + ' ' + ISNULL(TBL_PLAINTIFF.PMI, '')
     + ' ' + ISNULL(TBL_PLAINTIFF.Sufix, '') AS pltFull, TBL_PLAINTIFF.SSN,

Paul
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Expert Comment

by:Dishan Fernando
ID: 9872615
not populated mean NULL VALUES OR BLANK '' Column??
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LVL 9

Expert Comment

by:PaulBarbin
ID: 9872622
If you don't already know then the reason this happens is that one of those columns is NULL.  NULL means UNKNOWN, and UNKNOWN plus anything is still UNKNOWN.

Another way to solve this problem is by changing a db option CONCAT_NULL_YIELDS_NULL
by running
SET CONCAT_NULL_YIELDS_NULL OFF

Paul

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LVL 9

Expert Comment

by:PaulBarbin
ID: 9875406
I appreciate the points and the grade.
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Author Comment

by:FunkiNATEr
ID: 9875414
No problem -- I am sure I will have more in the near future.  :-)
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