Re: select/insert/delete
- From: Robert Freeman <robertgfreeman@xxxxxxxxx>
- To: michaeljmoore@xxxxxxxxx, david@xxxxxxxxxxxxxxxxxxxx
- Date: Tue, 7 Jun 2011 18:38:24 -0700 (PDT)
MERGE with a union as the source query?
Robert G. Freeman
Master Principal Consultant, Oracle Corporation, Oracle ACE
Author of various books on RMAN, New Features and this shorter signature line.
Blog: http://robertgfreeman.blogspot.com
Note: THIS EMAIL IS NOT AN OFFICIAL ORACLE SUPPORT COMMUNICATION. It is just
the
opinion of one Oracle employee. I can be wrong, have been wrong in the past and
will be wrong in the future. If your problem is a critical production problem,
you should always contact Oracle support for assistance. Statements in this
email in no way represent Oracle Corporation or any subsidiaries and reflect
only the opinion of the author of this email.
________________________________
From: Michael Moore <michaeljmoore@xxxxxxxxx>
To: david@xxxxxxxxxxxxxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx
Sent: Tue, June 7, 2011 6:36:52 PM
Subject: Re: select/insert/delete
I guess technically those don't involve a context switch however they're not
exactly the 'pure sql' solution I was half hoping for. However, you got me
thinking about the the trigger's performance if a do a bulk insert. Hmmm, I'll
have to do some testing,
Thanks,
Mike
On Tue, Jun 7, 2011 at 4:52 PM, David Litchfield <david@xxxxxxxxxxxxxxxxxxxx>
wrote:
On 08/06/2011 00:47, David Litchfield wrote:
>
>On 08/06/2011 00:12, Michael Moore wrote:
>>
>>I think the answer to this is NO, but just to be sure,
>>>
>>>Is there a single SQL statement that can:
>>>
>>>1) SELECT row-X from table A
>>>2) INSERT row-X into table B
>>>3) DELETE row-X from table A
>>>
>>>It would be nice to be able to do this without a context switch.
>>>
Yes you can... but it requires a bit of trickery (a function that'll execute
arbitrary sql)... Follow the example below...
>
Or you could use a trigger to fire after an insert on table_b to delete to data
in table_a... Which is probably the more sane way of doing it, lol :)
>
>HTH,
>David
>
>--
>//www.freelists.org/webpage/oracle-l
>
>
>
Other related posts:
