[AccessD] Every 100th record

Hi John:

This piece of code is untested but if you have an id field in your database
the following SQL script will pull every 100th record:

SELECT *
FROM   MyVeryBigTable
WHERE  (CAST(ID AS numeric) / 100 = CAST(ID AS int) / 100)

HTH
Jim

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of John W. Colby
Sent: Friday, August 27, 2004 8:39 AM
To: 'Access Developers discussion and problem solving'
Subject: RE: [AccessD] Every 100th record


Gustav,

I am working on a SQL Server database of about 65 million records.  We need
to pull a subset of those for doing counts of data in specific fields.
Trying to do that analysis on the entire 65 million records just won't work
at least in anything close to realtime.  Thus we literally want to pull
every Nth record.  If we pulled every 100th record into a table that would
give a sampling of 650K records to run this analysis on.  That still won't
be lightning fast but at least doable.

John W. Colby
www.ColbyConsulting.com

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Gustav Brock
Sent: Friday, August 27, 2004 11:22 AM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] Every 100th record


Hi John


> Does anyone have a strategy for pulling every Nth record?  My client
> wants to pull every 100th record into a dataset for analysis, to speed
> things up I am guessing.

To speed up what? Analysis on a sample only and not on the full set?

If so, you could select by "Random Between 1 To 100" = 1.

/gustav

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