| From: | "Richard Broersma" <richard(dot)broersma(at)gmail(dot)com> |
|---|---|
| To: | "Matthew Wilson" <matt(at)tplus1(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: More schema design advice requested |
| Date: | 2008-10-13 17:11:58 |
| Message-ID: | 396486430810131011s4b0a0ca0p4cfd22c5bf82568@mail.gmail.com |
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| Lists: | pgsql-general |
On Mon, Oct 13, 2008 at 9:29 AM, Matthew Wilson <matt(at)tplus1(dot)com> wrote:
> Any advice? I wonder if this is a sign of a bad design, or maybe if
> there's some nicer SQL techniques I could use.
I don't have the book in front of me at the moment, but I remember
this exact problem and a unique solution using a schema redesign
around skill sets that would return results very quickly. The method
described in the query was referred to as "full disjunction".
http://www.elsevier.com/wps/find/bookdescription.librarians/710075/description#description
sell the problem: 17: EMPLOYMENT AGENCY PUZZLE
Sorry that I can't be of more help than this.
--
Regards,
Richard Broersma Jr.
Visit the Los Angeles PostgreSQL Users Group (LAPUG)
http://pugs.postgresql.org/lapug
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