RE: Select from dual return 3 rows !
- From: "Igor Neyman" <ineyman@xxxxxxxxxxxxxx>
- To: <Les.Hollis@xxxxxx>, <jkstill@xxxxxxxxx>, <Rudy.Zung@xxxxxxx>
- Date: Tue, 8 Nov 2005 16:03:57 -0500
Nope.
What Jared was saying is that starting with particular version of
Oracle, there is no way to create second (or third,...) row in dual.
I.e., under 10.1 if you issue:
insert into dual values('Y');
nothing happens: you don't get an error, BUT (which is more important)
no additional rows created in dual.
You should really try it.
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Hollis, Les
Sent: Tuesday, November 08, 2005 3:53 PM
To: jkstill@xxxxxxxxx; Rudy.Zung@xxxxxxx
Cc: frank4oraclel@xxxxxxxx; ORACLE-L; frank.hansen@xxxxxxxxxxxxxxxxxxxx
Subject: RE: Select from dual return 3 rows !
Think what Rudy was trying to say is that it is a table and that
additional rows CAN be inserted....not that they SHOULD.....or WOULD....
Mistakes happen.....
I have hit this issue twice in 13 years....once I THINK it was because
of an import...the other ....I have no stinkin' clue.....
But on both, applications started going crazy due to the multiple rows
returned when only one expected.....fix was drop the table, recreate it
and recreate the public synonym......this with Oracle support on the
line......
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Jared Still
Sent: Tuesday, November 08, 2005 2:46 PM
To: Rudy.Zung@xxxxxxx
Cc: frank4oraclel@xxxxxxxx; ORACLE-L; frank.hansen@xxxxxxxxxxxxxxxxxxxx
Subject: Re: Select from dual return 3 rows !
On 11/8/05, Rudy Zung <Rudy.Zung@xxxxxxx> wrote:
DUAL, when you really come down to it, is really just a table
into which Oracle defaults with just a single record. However, because
it is just a simple table, additional records can be inserted into it,
as you have just discovered.
That is version dependent.
At least as far back as 8.1.7.4, there can
be only one row in sys.dual.
Try it.
--
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
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