Oracle FAQ | Your Portal to the Oracle Knowledge Grid |
Home -> Community -> Mailing Lists -> Oracle-L -> RE: Alternative way to write delete query
Small correction for SQL Server / Sybase, if anyone cares, of course -:)
Delete table1
from table_a
where column1 = col_a
or column1 = col_b
Igor Neyman, OCP DBA
ineyman_at_perceptron.com
-----Original Message-----
OLLIG
Sent: Tuesday, May 27, 2003 9:35 AM
To: Multiple recipients of list ORACLE-L
Mark -
you could also do it with 2 deletes something like this:
delete
from (select column1
from table1 , table_a where column1 = col_a)
delete
from (select column1
from table1 , table_b where column1 = col_b)
couldn't find a way to avoid the "ORA-01752: cannot delete from view
without
exactly one key-preserved table" with the or condition. perhaps someone
who
isn't still clearing the brain cobwebs after a long weekend can see a
solution there.
FWIW - i'm pretty sure SQL Server & Sybase will let you get by with this:
delete
from table1
, table_a , table_b
or column1 = col_b
(don't have a sandbox handy to confirm though) maybe that's what you
were
thinking of?
-----Original Message-----
Sent: Tuesday, May 27, 2003 12:27 AM
To: Multiple recipients of list ORACLE-L
Hi List,
I'm having a mental blank and looking for suggestions... I'm trying to remember alternative ways to write the below query:
delete from table
where column in (select col_a
from table_b union all select col_b from table_b);
Having said that, I don't mind if you simplify the nested query down to
"select col_a from table_b" even. I just have a feeling that I've seen
an
equivalent query written totally differently but I can't remember how.
I
have a feeling it effectively allows more than one table to be mentioned
in
the delete without needing a nested query (like the options available in
normal selects).
Any suggestions?
Thanks,
Mark.
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<---->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Privileged/Confidential information may be contained in this message.
If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone.In such case, you should destroy this message and kindly notify the sender
by reply e-mail or by telephone on (61 3) 9612-6999. Please advise immediately if you or your employer does not consent to
Internet e-mail for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of Transurban City Link Ltd shall be understood as neither given nor endorsed by it. <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<---->>>>>>>>>>>>>>>>>>>>>>>>>>>>>
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Mark Richard INET: mrichard_at_transurban.com.au Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: STEVE OLLIG INET: sollig_at_lifetouch.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Igor Neyman INET: ineyman_at_perceptron.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Tue May 27 2003 - 11:34:56 CDT