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Update query to update one field for two different condition

 
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sandip_mainframe
Warnings : 2

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Joined: 20 Sep 2006
Posts: 61
Location: pune

PostPosted: Thu Dec 17, 2009 4:23 pm    Post subject: Update query to update one field for two different condition
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Hi All,
My requirement is that I need to Update one field for two different condtions.

UPDATE TABLE
SET REQ_STA_CD = '6'
WHERE ENROLL_TYPE = 'R'

UPDATE TABLE
SET REQ_STA_CD = '7'
WHERE ENROLL_TYPE = 'V'

Is it possible to Update it in a single query ? If it is Please provide me the query.

Thanks,
Sandip Walsinge
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belchoff

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Joined: 21 Oct 2009
Posts: 4
Location: UK

PostPosted: Thu Dec 17, 2009 4:40 pm    Post subject:
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Have you heard about IN clause?

check it pls (google / manuals).
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Srihari Gonugunta

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Joined: 14 Sep 2007
Posts: 295
Location: Singapore

PostPosted: Thu Dec 17, 2009 4:42 pm    Post subject:
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Sandip,
You can do it in the following way.

Code:
UPDATE TABLE
SET REQ_STA_CD = (CASE WHEN ENROLL_TYPE = 'R' THEN '6'
             WHEN ENROLL_TYPE = 'V' THEN '7' END) 
WHERE ENROLL_TYPE = 'R' OR ENROLL_TYPE = 'V';
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rexx77

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Joined: 14 Apr 2008
Posts: 78
Location: Mysore

PostPosted: Thu Dec 17, 2009 4:44 pm    Post subject:
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AFAIK, there is no single query to perform your requirement.
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ashimer

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Joined: 13 Feb 2004
Posts: 551
Location: Bangalore

PostPosted: Thu Dec 17, 2009 4:51 pm    Post subject:
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Code:

UPDATE TABLE A
SET REQ_STA_CD = ( SELECT CASE WHEN ENROLL_TYPE = 'R' THEN '6'
                                                      WHEN ENROLL_TYPE = 'V' THEN '7'
                                 END FROM TABLE WHERE COL =   A.COL       )


This is possible only if there is a unique column COL in this table or else the inner query will receive -811.
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ashimer

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Joined: 13 Feb 2004
Posts: 551
Location: Bangalore

PostPosted: Thu Dec 17, 2009 4:54 pm    Post subject:
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Good one Srihari.
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