what do you mean by 'arc'?
From: Nuno Souto [EMAIL PROTECTED]
Date: 2003/07/24 Thu AM 09:39:29 EDT
To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED]
Subject: Re: Union quries: INTERSECT, MINUS, etc
- Original Message -
I'm doing research for an article on union queries. I'm
interested in finding examples of problems that were solved
using UNION, UNION ALL, INTERSECT, or MINUS, with the latter
two being of special interest because I don't see them used
very often. If you can think of an interesting problem
you've solved using one of these keywords, I'd love to hear
about it.
UNION is useful to implement arcs.
INTERSECT I've used very successfully
with two CONNECT BY queries to retrieve all
possible paths of travel between two points
A and B in a table that implements flight legs.
So don't go around saying it isn't used: I need
it or the RAAF can't book people to flights. ;)
Cheers
Nuno Souto
[EMAIL PROTECTED]
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Author: Nuno Souto
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