To: <sharmakdeep_oracle@xxxxxxxxx>, <dubey.sandeep@xxxxxxxxx>
Date: Thu, 23 Feb 2006 23:28:08 +0100
As Sandeep had mentioned, all the queries will
definitely have acct_id. But he didn't mention whether
cr_date will also 'always' be there.
my point was very simple. By the decision about the partitioning I would
additionally consider the following:
if the time dimension (cr_date) consists of a large number of distinct
values (e.g. timestamps) it is better to assign it as a range partition key.
if some dimension is used alternatively with BETWEEN predicates it is better
to assign it as a range partition key. A between predicate could be quit
common for time dimension.
But yes of course in special case if the time dimension has a fixed
granularity (e.g. monthly) and you get one new account per month on average,
there is no really a big difference between those two dimensions.
----- Original Message -----
From: "Deepak Sharma" <sharmakdeep_oracle@xxxxxxxxx>
To: <jaromir@xxxxxxxxxxxx>; <dubey.sandeep@xxxxxxxxx>
Sent: Thursday, February 23, 2006 5:09 AM
Subject: Re: Partition by three column values