Castle, Lindsay wrote:
I'm working on a project that has a data set of approximately 6million rows
with about 12,000 different elements, each element has 7 columns of data.
I'm wondering what would be faster from a scanning perspective (SELECT
statements with some calculations) for this type of set
Castle, Lindsay wrote:
The data structure looks like this:
element
date
num1
num2
num3
num4
units
There are approx 12,000 distinct elements for a total of about 6 million
rows of data.
Ahh, that helps! So are the elements evenly distributed, i
Hi all,
I'm working on a project that has a data set of approximately 6million rows
with about 12,000 different elements, each element has 7 columns of data.
I'm wondering what would be faster from a scanning perspective (SELECT
statements with some calculations) for this type of set up;
July 2003 11:06 AM
To: Castle, Lindsay
Cc: [EMAIL PROTECTED]
Subject: Re: [PERFORM] One table or many tables for data set
Castle, Lindsay wrote:
> The data structure looks like this:
> element
> date
> num1
> num2
> num3
> num4
>
On Tue, 2003-07-22 at 21:50, Rod Taylor wrote:
> Ok.. Unless I'm missing something, the data will be static (or near
> static). It also sounds as if the structure is common for elements, so
> you probably only want 2 tables.
I misunderstood. Do what Joe suggested.
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Thanks Rod
My explanations will be better next time. :-)
-Original Message-
From: Rod Taylor [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 23 July 2003 11:41 AM
To: Castle, Lindsay
Cc: Postgresql Performance
Subject: Re: One table or many tables for data set
On Tue, 2003-07-22 at 21:50,
Apologies, let me clear this up a bit (hopefully) :-)
The data structure looks like this:
element
date
num1
num2
num3
num4
units
There are approx 12,000 distinct elements for a total of about 6 million
rows of data.
The scanning technology
Ok.. Unless I'm missing something, the data will be static (or near
static). It also sounds as if the structure is common for elements, so
you probably only want 2 tables.
One with 6 million rows and any row information. The other with 6
million * 12000 rows with the element data linking to the
On Tue, 2003-07-22 at 20:34, Castle, Lindsay wrote:
> Hi all,
>
> I'm working on a project that has a data set of approximately 6million rows
> with about 12,000 different elements, each element has 7 columns of data.
Are these 7 columns the same for each element?
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