Remove duplicates from my select


I have a table called TestingRules that has two column PxCodeICD9 and PxCodeICD10

I want to create a temp column that would combine both columns and remove any duplicates.

select PxCodeICD9 , PxCodeICD10
from TestingRules 

the output is this: 

PxCodeICD9     PxCodeICD10
5246                     8548
6574                     6951
8548                     1452
6951                     8658

but the output that I want is this: 


I want to remove any duplicates and have them as one column instead of two. 

Thank you for your help.


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Jim HornMicrosoft SQL Server Data DudeCommented:
Use a UNION statement, which joins two sets and eliminates duplicates..
select PxCodeICD9 as PxCode FROM TestingRules 
SELECT PxCodeICD10 FROM TestingRules 

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Testing code...
CREATE TABLE TestingRules (PxCodeICD9 int, PxCodeICD10 int) 

INSERT INTO TestingRules (PxCodeICD9 , PxCodeICD10) 
VALUES (5246, 8548), (6574, 6951), (8548, 1452), (6951, 8658)

select PxCodeICD9 as PxCode FROM TestingRules 
SELECT PxCodeICD10 FROM TestingRules 

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lulu50Author Commented:

That's easy!!!

hmmm hmmm I'm learning :-)

Thank you
lulu50Author Commented:
Thank you
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