RE: Update Query

From: Hillman, Alex <Alex.Hillman_at_usmint.treas.gov>
Date: Wed, 30 May 2001 13:09:17 -0700
Message-ID: <F001.003145D1.20010530124305@fatcity.com>

if it was for one column you could use nvl or decode

update tablea set firstname=nvl((select firstname from tableb where tablea.id=tablea.id), firstname);

Alex Hillman

-----Original Message-----
Sent: Wednesday, May 30, 2001 3:56 PM
To: Multiple recipients of list ORACLE-L

Seems like Oracle Doesn't have to the query like this:

update tablea set firstname=tableb.firstname, lastname=tableb.lastname
where tableb.id = tablea.id;

I can have one, it works if it has a match for the two tables, otherwise the two columns updated to null:

update tablea set (firstname,lastname)
=(select firstname,lastname from tableb
where tableb.id=tablea.id);

Then the following one works, but very ugly:

update tablea set (firstname,lastname)
=(select firstname,lastname from tableb
where tableb.id=tablea.id)
where exists(
select 'x' from tableb
where tableb.id=tablea.id)

Any suggestions?
TIA Chris Harvest

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Author: CC Harvest
INET: ccharvest_at_yahoo.com

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Author: Hillman, Alex
INET: Alex.Hillman_at_usmint.treas.gov

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