Re: Dual - multiple rows

A copy of this was sent to g.renfrew_at_acca.org.uk (if that email address didn't require changing) On Thu, 02 Sep 1999 10:11:43 GMT, you wrote:

>Hi everyone,
>
>I'm running 7.3.2.3 on Solaris 2.6 and came across a bit of a weird
>problem with the DUAL table. When I selected from DUAL it always
>returned two identical rows. On all my other databases I would only
>ever expect one row returned, as is normal. This problem caused a
>couple of errors with "ora-1422: exact fetch returns more than
>requested number of rows". When I did "select * from dual" it returned
>the following:
>DUMMY
>-----
>X
>x
>
>Since all my other databases returned only 'X' I deleted from dual
>where DUMMY = 'x' and everything is ok now.
>Any ideas on how an extra row would appear in DUAL?
>

somebody inserted it (one of your DBAs probably).

DUAL is a real table -- its not special or anything. If it has no rows -- that'll cause havoc. If it has >1 row, same thing.

>Best Regards
>Graeme Renfrew
>DBA
>ACCA
>Glasgow
>
>
>Sent via Deja.com http://www.deja.com/
>Share what you know. Learn what you don't.

--
See http://govt.us.oracle.com/~tkyte/ for my columns 'Digging-in to Oracle8i'... Current article is "Part I of V, Autonomous Transactions" updated June 21'st  

Thomas Kyte                   tkyte_at_us.oracle.com
Oracle Service Industries     Reston, VA   USA

Opinions are mine and do not necessarily reflect those of Oracle Corporation Received on Thu Sep 02 1999 - 06:17:16 CDT