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case when... end in update clause?

From: Emi Lu <emilu(at)encs(dot)concordia(dot)ca>
To: pgsql-sql(at)postgresql(dot)org
Subject: case when... end in update clause?
Date: 2008-03-12 15:47:18
Message-ID: 47D7FB06.10707@encs.concordia.ca (view raw or flat)
Thread:
Lists: pgsql-sql
Hello,

May I know can "case when " used by update clause. If yes, how?

I use one small Example, table: test
=============================
id
==
5
6
8

try to update test.id


update test

case
  when id =5 then SET id = 6
end
;

Thanks!

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Next:From: Emi LuDate: 2008-03-12 16:01:21
Subject: Re: case when... end in update clause?
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Subject: Re: Composite UNIQUE across two tables?

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