Blank space where value is NULL

I have a report with the following code entered for reporting insurance information.

CASE WHEN AI.InsuranceSeqID = '1' then AI.InsuredPolicyNumber END AS 'PolicyNumber1',
                  CASE WHEN AI.InsuranceSeqID = '2' then AI.InsuredPolicyNumber END AS 'PolicyNumber2',
                        CASE WHEN AI.InsuranceSeqID = '3' then AI.InsuredPolicyNumber END AS 'PolicyNumber3',
                              CASE WHEN AI.InsuranceSeqID = '4' then AI.InsuredPolicyNumber END AS 'PolicyNumber4',

When I run the report, if the patient does not have an AI.InsuranceSeqID of 2,3,or 4, it is returning NULL in the column.  I would like this to be blank if there is no policy number for this SeqID,

It currently prints.  PolicyNumber1   PolicyNumber2 PolicyNumber3  PolicyNumber4
                                  t1234567890        NULL                   NULL                    NULL

I want:                     PolicyNumber1   PolicyNumber2 PolicyNumber3  PolicyNumber4
                                 1234567890
kvrogersAsked:
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Lee SavidgeCommented:
Replace with a blank using isnull()

isnull(CASE WHEN AI.InsuranceSeqID = '1' then AI.InsuredPolicyNumber END, '') AS 'PolicyNumber1',
isnull(CASE WHEN AI.InsuranceSeqID = '2' then AI.InsuredPolicyNumber END, '') AS 'PolicyNumber2',
isnull(CASE WHEN AI.InsuranceSeqID = '3' then AI.InsuredPolicyNumber END, '') AS 'PolicyNumber3',
isnull(CASE WHEN AI.InsuranceSeqID = '4' then AI.InsuredPolicyNumber END, '') AS 'PolicyNumber4',

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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
To convert NULL to an empty space '' in T-SQL, use either ISNULL(column_name, '') or COALESCE(column_name, '').

Since you're doing this for reporting, it might be more appropriate to pull this off in the reporting layer, and not the data set.  Your call.
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Steve WalesSenior Database AdministratorCommented:
Untested, but you should be able to do:

isnull(CASE WHEN AI.InsuranceSeqID = '1' then AI.InsuredPolicyNumber END, ' ') AS 'PolicyNumber1',
isnull(CASE WHEN AI.InsuranceSeqID = '2' then AI.InsuredPolicyNumber END, ' ') AS 'PolicyNumber2', 
isnull(CASE WHEN AI.InsuranceSeqID = '3' then AI.InsuredPolicyNumber END, ' ') AS 'PolicyNumber3', 
isnull(CASE WHEN AI.InsuranceSeqID = '4' then AI.InsuredPolicyNumber END, ' ') AS 'PolicyNumber4', 

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ISNULL is a valid function for both MySQL and SQL Server (since you tagged both in your question).
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Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
Insert before each END

ELSE ''
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awking00Commented:
CASE WHEN AI.InsuranceSeqID = '1' then coalesce(AI.InsuredPolicyNumber,'') END AS 'PolicyNumber1',
CASE WHEN AI.InsuranceSeqID = '2' then coalesce(AI.InsuredPolicyNumber,'') END AS 'PolicyNumber2',
CASE WHEN AI.InsuranceSeqID = '3' then coalesce(AI.InsuredPolicyNumber,'') END AS 'PolicyNumber3',
CASE WHEN AI.InsuranceSeqID = '4' then coalesce(AI.InsuredPolicyNumber,'') END AS 'PolicyNumber4',

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kvrogersAuthor Commented:
Thank you for your prompt reply.  This worked perfectly.
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awking00Commented:
>>This worked perfectly<<
And Lee Savidge's didn't?
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Steve WalesSenior Database AdministratorCommented:
Points should really have gone to Lee - his was the exact same response as mine.  Filing Request for attention for Moderators to review.
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kvrogersAuthor Commented:
I started from the last entry which was in my email.  That one worked.  I am sorry I missed Lee's.
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