RE: FROM SRINIVAS -HELP

If those records are able to retrieve by a query, then u can use export with query option too.

Nirmal.

> -----Original Message-----
> From: Jared Still [SMTP:jkstill_at_cybcon.com]
> Sent: Tuesday, August 28, 2001 6:06 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: FROM SRINIVAS -HELP
>
>
>
> Some requirements please:
>
> is it ok if a row is chosen more than once?
>
> it will be statistically impossible to pick 10 million
> rows from a set of 44 million without many duplicates.
>
> if it is ok, just write a pl/sql script to loop through
> the table, skip a random number of rows, grab one, repeat.
>
> you will likely have to scan the table multiple times.
>
> not very efficient. but hey!, I'm just the idea man here. :)
>
> if you don't want duplicates, you will need to track those that
> you have already chosen and skip them. this has the potential
> to be a very long running script.
>
> why not just go throught the entire table once, pick every 4th
> row, and be done with it?
>
> Not random, but just how important is randomness to you? you
> didn't state the purpose of this exercise.
>
> Jared
>
> On Monday 27 August 2001 09:00, Srinivas_Madala_at_circuitcity.com wrote:
> > I have 44 million records in my table.I need to extract the 10 million
> > records randomly,how to retrieve these records randomly. I used the
> > dbms_random.sql ,but I have a doubt that I was correct or not.
> > can U please guide me or just send a piece of code.
> > Thanking U
> > srinivas
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> Author: Jared Still
> INET: jkstill_at_cybcon.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Nirmal Kumar  Muthu Kumaran
  INET: NIRMALK_at_qtel.com.qa

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