From: | Paul Lambert <paul(dot)lambert(at)autoledgers(dot)com(dot)au> |
---|---|
To: | Ron Johnson <ron(dot)l(dot)johnson(at)cox(dot)net> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: How to create an archive for old records? |
Date: | 2007-02-15 01:34:34 |
Message-ID: | 45D3B8AA.3090501@autoledgers.com.au |
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Thread: | |
Lists: | pgsql-general |
Ron Johnson wrote:
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> On 02/14/07 19:11, carter ck wrote:
>> Hi all,
>>
>> I am looking for ways to create an archive of records older than 3
>> months in one of my table, and store these extracted records into a
>> local database. Does Postgres have any command to do this?
>
> A single command that will copy data to a destination database, and
> then delete from the source database?
>
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> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>
>
I think the problem may be in determining when a record was added to the
table. If there is no 'date added' column as part of your table
specification that you populate when adding a row then is there any way
to determine when a record was added?
If there is a date added (which is a standard I put in all tables I use)
then it should be a fairly straight forward task of doing an INSERT INTO
followed by a DELETE FROM. As for a single command... I'm not aware of
any "INSERT INTO AND DELETE ORIGINAL" variant so it would have to be two
SQL commands, albeit it uncomplicated.
--
Paul Lambert
Database Administrator
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