Reply to Re: Relationships error, C# Visual Studio 2005 database bug?, "the columns in table XYZ do not match an existing primary key or UNIQUE constraint", copying columns

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Posted by raylopez99 on 07/15/07 12:34

On Jul 15, 5:15 am, SQL Menace <denis.g...@gmail.com> wrote:

> Also how will you do one of these queries
> return all customers who live in LA and have ordered product x between
> June 2006 and July 2007
>
> Denis The SQL Menace

You wrote your dB is 300 GB--but how much of this is raw data?
Perhaps 10%? The other 90% is junk to link the data (I'm guessing).
If so, you can buy 30 GB of RAM and when x86/Windows supports 64 bit
better (though I think they already do--Itanium?) you can access this
30 GB with no problem. 30 GB RAM costs about $1000. Not expensive.

As for the query: " > return all customers who live in LA and have
ordered product x between > June 2006 and July 2007"

This is simple using a flat file as I propose: "customers & (order*
or purchase or buy*) & product x & (DATE T (June 2006 < T < July
2007))". Suitable code can be written to make these Boolean operators
work. Some cleanup might be required to strip out false hits, but
these false hits are present in regular databases today. Also
remember right now with RDBMS you expend a tremendous amount of work
putting data into "orthogonal" databases, via data entry forms. You
have to pay people to enter the data correctly (even if your program
rejects bad data entry, you still have to pay people to enter the data
correctly). You can avoid all of this with a flat file. Just dump
the raw data into memory and let an inference or search engine index
the data and make the associations via pointers.

RL

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