it was meant to be "all things to all people"
I know WHY they did what they did, what pissed me off was that they
used the excuse that ORACLE couldn't handle more than 4 table joins
- Igor Neyman <ineyman_at_perceptron.com> wrote:
> Actually this is true for MS SQL Server: can not handle efficiently
> more
> than 6 joined tables, at least on 6.5 version.
> So, m.b. vendor's product was supposed to run not only on Oracle, but
> other
> databases as well.
>
> Igor Neyman, OCP DBA
> ineyman_at_perceptron.com
>
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Wednesday, March 13, 2002 9:58 AM
>
>
> > oh yes, one more, I got this from a vendor, as an explanation of
> why
> > they didn't do a lookup table but instead added columns to the row
> for
> > EVERY possible value in the lookup table:
> >
> > Oracle doesn't handle joins with more than 4 tables very well
> >
> >
> >
> > --- Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk> wrote:
> > >
> > > My next to favourite legends.
> > >
> > > Small tables don't need to be indexed
> > >
> > > Small tables are anything 4 blocks or less
> > >
> > > Oracle copies the entire row into the rollback
> > > segment when updating a single column.
> > >
> > > Oracle copies the entire block into the rollback
> > > segment when updating a row.
> > >
> > > Oracle can only use 5 indexes in a query
> > > (though I haven't heard that one much recently)
> > >
> > > Setting tablespace default pctincrease to 1 reduces
> > > fragmentation problems.
> > > (but that's going out of fashion too)
> > >
> > > But I guess you, Jeremiah and Rachel have
> > > already got those covered.
> > >
> > >
> > >
> > > Jonathan Lewis
> > > http://www.jlcomp.demon.co.uk
> > >
> > > Next Seminar - UK, April 3rd - 5th
> > > http://www.jlcomp.demon.co.uk/seminar.html
> > >
> > > Host to The Co-Operative Oracle Users' FAQ
> > > http://www.jlcomp.demon.co.uk/faq/ind_faq.html
> > >
> > > Author of:
> > > Practical Oracle 8i: Building Efficient Databases
> > >
> > >
> > > -----Original Message-----
> > > To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> > > Date: 12 March 2002 22:54
> > >
> > >
> > > |Everyone, some great ideas....
> > > |
> > > |RF
> > > |
> > > |Robert G. Freeman - Oracle8i OCP
> > > |Oracle DBA Technical Lead
> > > |CSX Midtier Database Administration
> > >
> > >
> > > --
> > > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > > --
> > > Author: Jonathan Lewis
> > > INET: jonathan_at_jlcomp.demon.co.uk
> > >
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> 538-5051
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> >
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Igor Neyman
> INET: ineyman_at_perceptron.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing
> Lists
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Received on Wed Mar 13 2002 - 16:24:53 CST
