Re: How to deal with almost recurring data?

Thanks
The standard case is: I enter a date and 2 parameters of the event and I
get the result set.
Even though with Java date arithmetics are quite simple and I could
therefore extend my software in that fashion, I would much rather perform
all queries entirely in the database.
So in case I go about it the way I described, I will have 4 million
entries in the table that stores the dates and the references to the
event.
Now - how do I handle that database if I want to maintain very good query
times (<1-3 seconds)?
I have no idea how to handle a 1GB database in terms of query performance,
like what tricks to use, what to do and what to avoid.
Thanks

Matt

--- Ursprüngliche Nachricht ---
Datum: 16.11.2004 16:32
Von: Csaba Nagy <nagy(at)ecircle-ag(dot)com>
An: matthias(at)cmklein(dot)de
Betreff: Re: [GENERAL] How to deal with almost recurring data?

> I would say it all depends on what you want to do with the data.
> If you want to look up all the possible occurences for an event, it
> might be useful to have the simple solution you described. If you will
> only look up the next n occurences starting from a given date, you
might
> be better off storing the rule to derive the dates, and then calculate
> them in your software, but this will make your software more
complicated
> for sure (dealing with date arithmetics can be incredibly complex, I've
> been there). I would go with the simple solution as long as there is
> enough space in the DB to store all the occurences...
>
> HTH,
> Csaba.
>
> On Tue, 2004-11-16 at 15:53, matthias(at)cmklein(dot)de wrote:
> > I am creating a database which is supposed to contain many data
entries
> > (events) that differ only in the date they occur.
> >
> > So let's say event 1 occurs every Monday, Tuesday and Sunday between
> > January 1st and May 30th 2005.
> >
> > How do I store and manage such data in a meaningful way?
> >
> > The simple idea would be to store the event itself in one table and
have
> > another table containing all the dates (all Mondays, Tuesdays and
Sundays
> > between 2005-01-01 and 2005-05-30) plus a foreign key to event_ID =>

> > (date, event_id).
> >
> > The problem is that we are dealing with several tenthousand events,
> > resulting in several million single dates if I stored it in the
described
> > manner.
> >
> > That is why I would like to know if there is a better way to store
and
> > manage such information?
> >
> > Thanks
> >
> > Matt
> >
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