Oracle-L: RE: Finding out last 10 records

From: Amjad Saiyed <amjad_at_medicomsoft.com>
Date: Wed, 14 Aug 2002 04:28:23 -0800
Message-ID: <F001.004B41FC.20020814042823@fatcity.com>

i thought santosh wanted records based on value that is 1st 10 minimal values and last 10 max values...well if this is not the case than the solution that i had send using rownum is obsolete and hence ignore it....

rgds,
Ams.
www.medicomsoft.com.
  -----Original Message-----
  From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of Alexandre Gorbatchev
  Sent: Wednesday, August 14, 2002 3:08 PM   To: Multiple recipients of list ORACLE-L   Subject: Re: Finding out last 10 records

Santosh,

There is no "last" and "first" records in relational databases in terms of location. All records are equal and may be stored physically anywhere. I guess that may be possible (parsing ROWID and using information about extent location) to sort records by extent, block and number of record inside block, but that's not a trivial task.
If you need to select last 10 inserted records, make a trigger with filling a timestamp into a column and select with sort by this column using rownum in where condition.

Alexandre

Original Message ----- From: Santosh Varma To: Multiple recipients of list ORACLE-L Sent: Wednesday, August 14, 2002 11:48 AM Subject: Finding out last 10 records

Hello all

Could any one of you guide me on how to select last 10 records from a table. and also finding out first 10 records..

Thanks and regards,

Santosh

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Author: Amjad Saiyed
INET: amjad_at_medicomsoft.com

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