ha, ha. you got bit by the "null" update thing too, I remember it
well! :)
except for maybe some newfangled oracle8 features, the "ugly" one is
the "traditional" way the manual says to do it (iirc). I have many
many scripts with that kind of code in them since we load mainframe
datafiles into the local oracle apps, and do a lot of cross-table
updates (non-normalized, but that is mostly ok since it is archive
data).
you *can* "pretty" it up a bit by using better formatting,
e.g.,
update
tablea a
set
(
a.firstname,
a.lastname
)
=
(
select
b.firstname,
b.lastname
from
tableb b
where
b.id = a.id
)
where
a.id in
(
select
b2.id
from
tableb b2
)
/
On 30 May 2001, at 11:56, CC Harvest wrote:
Date sent: Wed, 30 May 2001 11:56:14 -0800
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> 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)
...
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Author: Eric D. Pierce
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