Re: Partition by three column values
- From: Deepak Sharma <sharmakdeep_oracle@xxxxxxxxx>
- To: dubey.sandeep@xxxxxxxxx, oracle-l@xxxxxxxxxxxxx
- Date: Tue, 21 Feb 2006 14:42:03 -0800 (PST)
Sandeep,
Which Oracle version are you on?
Deepak
> Hi all,
>
> I have a table structure similar to:
>
> Acct_id, site_id, cr_date, ndc
>
> This table will store approximately 700 million
> rows. There will be
> approximately 10 distinct acct_id and distinct
> site_id. Acct_id can
> have multiple site_id. Any query on the table will
> always include
> acct_id but may or may not include site_id, cr_date
> or ndc. New
> acct_id and site_id can be added to table later. I
> need to purge data
> from this table based on acct_id, site_id and
> cr_date. For example
> purge data for acct_id 1, site_id 1 older than 3
> years, For act_id 1,
> site_id 2, purge data older than 4 years and act_id
> 2 site_id 3 purge
> data older than 5 years.
>
> Given the table size and purging requirement, I
> should partition this
> table. How can I partition this table so that I can
> drop partition
> based on acct_id, site_id and cr_date? If I make
> multi column range
> partition on acct_id, site_id , cr_date , I can not
> add a new
> partition for new site_id for acct_id less than
> max(acct_id). E.g if I
> have partitions as
> 1,1, jan2006
> 2,2,jan2006
>
> I can not add partition for 1, 3, jan2006
>
> I can not create composite partition either, as sub
> partition can only
> be hash partitioned and I can not drop partitions
> based on acct_id,
> site_id and cr_date.
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