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Doable? Left join to 2 tables but have same alias

Posted on 2013-02-03
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Last Modified: 2013-02-03
I have a table that has some data in it. I created a new table but I cant get rid of the old one. For old/orig data, I still want to go to table1 and get the info. Anyway I can have the same alias for both the old and new table so I could pull data from both tables? This is what I have:

SELECT
nmp.id AS nonMemberProviderId,
ipn.id AS nonMemberPatientId,
ISNULL(CAST(dfl.id AS VARCHAR(MAX)),'') AS fileRowId
...

from
 .....
  LEFT JOIN dbo.Doc_Files_Letter dfl ON dfl.patientId = ipn.id
  LEFT JOIN dbo.LetterFiles dfl ON dfl.patientId = ipn.id
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Question by:Camillia
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2 Comments
 
LVL 6

Accepted Solution

by:
liija earned 2000 total points
ID: 38849111
No, same alias cannot be used twice.
But with the same script you could unite the data from two tables - depending on your data like this:

SELECT
nmp.id AS nonMemberProviderId,
ipn.id AS nonMemberPatientId,
ISNULL(CAST(dfl.id AS VARCHAR(MAX)), CAST(dfl_new.id AS VARCHAR(MAX)) AS fileRowId
...

from
 .....
  LEFT JOIN dbo.Doc_Files_Letter dfl ON dfl.patientId = ipn.id
  LEFT JOIN dbo.LetterFiles dfl_new ON dfl_new.patientId = ipn.id
0
 
LVL 7

Author Comment

by:Camillia
ID: 38849186
let me try
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