Select from dual return 3 rows !

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Select from dual return 3 rows !

Select from dual return 3 rows !

2005-11-08 - By Igor Neyman

Reply: 1 2 3 4 5 6 7 8 9 10 >>

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@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Hollis, Les
Sent: Tuesday, November 08, 2005 3:53 PM
To: jkstill@(protected); Rudy.Zung@(protected)
Cc: frank4oraclel@(protected); ORACLE-L; frank.hansen@(protected)
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@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Jared Still
Sent: Tuesday, November 08, 2005 2:46 PM
To: Rudy.Zung@(protected)
Cc: frank4oraclel@(protected); ORACLE-L; frank.hansen@(protected)
Subject: Re: Select from dual return 3 rows !

On 11/8/05, Rudy Zung <Rudy.Zung@(protected)> 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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<DIV dir=ltr align=left>Nope.</DIV>
<DIV dir=ltr align=left>What Jared was saying is that starting with particular
version of Oracle, there is no way to create second (or third,...) row in
dual.</DIV>
<DIV dir=ltr align=left>I.e., under 10.1 if you issue:</DIV>
<DIV dir=ltr align=left>insert into dual values('Y');</DIV>
<DIV dir=ltr align=left> </DIV>
<DIV dir=ltr align=left>nothing happens: you don't get an error, BUT (which is
more
important) no additional rows created in dual.</DIV>
<DIV dir=ltr align=left>You should really try it.</DIV> 
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)] On Behalf Of Hollis,
Les Sent: Tuesday, November 08, 2005 3:53 PM To:
jkstill@(protected); Rudy.Zung@(protected) Cc: frank4oraclel@(protected);
ORACLE-L; frank.hansen@(protected) Subject: RE: Select from
dual return 3 rows ! </DIV>
<DIV></DIV>
<DIV class=Section1>
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….<o:p></o:p>

<o:p> </o:p>
Mistakes
happen…..<o:p></o:p>
<o:p> </o:p>
<o:p> </o:p>
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…..<o:p></o:p>
<o:p> </o:p>
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……<o:p></o
:p>
<o:p> </o:p>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center>
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</DIV>
From:
oracle-l-bounce@(protected) [mailto:oracle-l-bounce@(protected)] On Behalf Of Jared Still Sent: Tuesday, November 08, 2005 2:46
PM To:
Rudy.Zung@(protected) Cc:
frank4oraclel@(protected); ORACLE-L; frank.hansen@(protected) Subject: Re: Select from dual return 3
rows
!<o:p></o:p></DIV>
<o:p> </o:p>
On 11/8/05, Rudy
Zung <<A href="mailto:Rudy.Zung@(protected)">Rudy.Zung@(protected)</A>&gt
;
wrote:<o:p></o:p>
<DIV>
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none">
<DIV>
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.<o:p></o:p></DIV>
<DIV>
 <o:p></o:p></DIV></BLOCKQUOTE
></DIV>
 That is version dependent. At least as far
back as <A href="http://8.1.7.4">8.1.7.4</A>, there can be only one row in
sys.dual. Try it. -- Jared Still Certifiable
Oracle DBA and Part Time Perl
Evangelist<o:p></o:p></DIV></BODY></HTML>