Oracle-L: Re: Partitioning

From: Jay Hostetter <jhostetter_at_decommunications.com>
Date: Tue, 12 Aug 2003 11:19:30 -0800
Message-ID: <F001.005CA4FE.20030812111930@fatcity.com>

If it has a date column, partition by that column into whatever makes sense (weeks, months, etc.)

CREATE TABLE YOURTABLE
(

  YOURDATE              DATE              NOT NULL,
  YOURCOLUMN         NUMBER

)
PARTITION BY RANGE (YOURDATE)
(
PARTITION YOURTABLE_JUN03 VALUES LESS THAN (TO_DATE(' 2003-07-01', 'YYYY-MM-DD') TABLESPACE DATA_06,
PARTITION YOURTABLE_JUL03 VALUES LESS THAN (TO_DATE(' 2003-08-01', 'YYYY-MM-DD)

    TABLESPACE DATA_07,
  PARTITION DETAILS_AUG03 VALUES LESS THAN (TO_DATE(' 2003-09-01', 'YYYY-MM-DD')
    TABLESPACE DATA_08

);

Jay

>>> Dennis.Meng_at_cardinal.com 08/12/03 12:04PM >>>
I have worked with partitioning before but have yet encountered the following challenge - The table we are trying to partition is a large table with hundreds of millions of rows, which is ok. But it does not have a month column, although it has dates. I would like to partition by month because this table contains years of data and partitioning by days will result in thousands of partitions. Of course we can add a month column but I think that will require extensive downtime which we can't afford and I suspect it will cause row-chaining as well. So anybody care to share with me any other options/suggestions?

TIA Dennis

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Author: Jay Hostetter
  INET: jhostetter_at_decommunications.com

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Received on Tue Aug 12 2003 - 14:19:30 CDT