How to add partition to an existing table

I have a table that contains lot of data.I need to add partitions to it to improve the performance of the procedures
using this table.This table is having no existing partition.

create partitioned table and move your data into. You can't create partitions based on common heap-table.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/partconc.htm#CNCPT011

Similar Messages

  • How to add create partition to an existing table?

    hi,
    please tell me how to add partition to an existing table.
    i have tried
    alter table mvr add partition sno
    but getting error : ORA-14501: object is not partitioned
    thanks.

    Just Googling for ora-14501 resulted in the following
    Adding a partition results in ORA-14501: object is not partitioned
    It is really sad you can not do this on your own, and always need someone to do this for you.
    Sybrand Bakker
    Senior Oracle DBA

  • Best way to change partition key on existing table

    Hi,
    Using Oracle 11.20.3 on AIX.
    We have a table about 800 million rows and 120gb in size.
    Want to try copies oif this table to evalaute different partitiong strategies.
    What is the quickest way to do this?
    Would have liked say datapump table 1 tro disk and datapumo import the data to new table but do the tables need to be of the same format.
    Thanks

    >
    Using Oracle 11.20.3 on AIX.
    We have a table about 800 million rows and 120gb in size.
    Want to try copies oif this table to evalaute different partitiong strategies.
    What is the quickest way to do this?
    Would have liked say datapump table 1 tro disk and datapumo import the data to new table but do the tables need to be of the same format.
    >
    First your subject asks a different question that the text you posted: Best way to change partition key on existing table. The answer to that question is YOU CAN'T. All data has to be moved to change the partition key since each partition/subpartition is in its own segment. You either create a new table or use DBMS_REDEFINITION to redefine the table online.
    Why do you want to export all data to a file first? That just adds to the time and cost of doing the op.
    What problem are you trying to use partitioning to solve? Performance? Data maintenance? For performance the appropriate partitioning key and whether to use subpartitions depends on the types of queries and the query predicates you typically use as well as the columns that may be suitable for partition keys.
    For maintenance a common method is to partition on a date by year/month/day so you can more easily load new daily/weekly/monthly data into its own partition or drop old data that no longer needs to be kept online.
    You should use a small subset of the data when testing your partitionings strategies.
    Can you do the partitioning offline in an outage window? If not then using the DBMS_REDEFINITION is your only option.
    Without knowing what you are trying to accomplish only general advice can be given. You even mentioned that you might want to use a different set of columns than the curren table has.
    A standard heap table uses ONE segment for its data (ignoring possible LOB segments). A partitioned/subpartitioned table uses ONE segment for each partition/subpartition. This means that ALL data must be moved to partition the table (unless you are only creating one partition).
    This means that every partitioning scheme that uses a different partition key requires ALL data to be moved again for that test.
    Provide some information about what problem you are trying to solve.
    >
    Is this quicker than datapump?
    >
    Yes - exporting the data simplying moves it all an additional time. Ok to export if you need a backup before you start.
    >
    Found artcle which talks about using merge option on datapump import to convert partitioned table to non-partitioned table.
    >
    How would that apply to you? That isn't what you said you wanted to do.

  • How to add one column in existing search help.

    Hi Folks,
    My quesion is
    How to add one column in existing search help and also Now search help on that field is not an explicit search help. It should be implement using check table.
    Shivam

    Hi,
    If you want to add a field in Elementary search help, get the search help name for the and go to change mode and add the field in it.
    If you want to add a field in collective search help, go to included search helps tab and a new search help name and add the fields to it.
    I think this should help you to certain extent.
    Regards,
    Kranthi
    Edited by: Kranthi on Jan 14, 2010 11:15 AM

  • How to create partition after creating the table

    I have created a table. Now I want to create range partitions of that table.Please tell me how to do this?

    Yes, that is true.
    It is also possible to create a new partitioned table with exactly the same structure, ensure it has a partition, and exchange (trade) the partition for that existing table. That is outlined in the DBA manual at http://tahiti.oracle.com under chapter 17 "Managing Partitioned Tables and Indexes" close to the keywords 'exchange' or 'convert'

  • Can we addnew partition and sub partition in the existing table in one shor

    can we addnew partition and sub partition in the existing table in one short

    nav wrote:
    can we addnew partition and sub partition in the existing table in one shortYes,
    You can and below is the example for Range-List partition
    ALTER TABLE <table_name>
       ADD PARTITION <partition_name> VALUES LESS THAN (<value>
          STORAGE (INITIAL 20K NEXT 20K) TABLESPACE <TS name> NOLOGGING
              SUBPARTITION Clause
              SUBPARTITION Clause
              SUBPARTITION Clause
              SUBPARTITION Clause
               );

  • Oracle partitioning - change in existing tables

    I recently started working with legacy code and noticed that some huge tables (5 years worth of data, don't have more details on me right now but can post later if needed) are partitioned based on time sequence number column while majority of queries are done based on time (different column). Queries performance is degrading over time and I'd like to try to modify partitioning and run some tests to see if there is a performance improvement.
    My only concern is this is a lot of data and they are all live, so I have to come up with some sort of solution on how to switch partitioning with the least impact on applications running 24 x 7.
    Can someone suggest a viable solution? Something you have done in the same situation and it worked?
    If there is a certain technique on how to do it, please give me search keywords and I will google the rest.
    Thanks,
    S.

    You can't change the partitioning of an existing table.
    You can, however, use the DBMS_REDEFINITION package to do an online redefinition. Behind the scenes, what you're really doing is
    - Creating a new table with the new partitioning scheme
    - Copying the data from the old table to the new table
    - Dropping the old table
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    Now, if the large table is only being queried, not updated (or at least you have a window where it is read-only), it's probably easier to just do these steps manually rather than using DBMS_REDEFINITION where you at least have finer grained control over the steps. You'll still need a moment where the table is inaccessible to do the actual rename.
    Justin

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  • Can we create partitions in an existing table?

    Hi,
    Can we create partitions in an existing table which has about a million rows? I am using oracle 9i database.
    Can any one suggest me on this please.

    07b3ea8e-c4c5-4559-9055-ed38853dc64e wrote:
    Hi,
    Can we create partitions in an existing table which has about a million rows? I am using oracle 9i database.
    Can any one suggest me on this please.
    can NOT be done.
    research DBMS_REDEFINITION

  • How to add subpartitions to the existing subpartition template

    Hi All,
    My Question is ,how to add Subpartition to the exiting subpartition template. e
    like i have created a table with subpartition template with with 5 subpartitions like
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    Sree

    >
    My Question is ,how to add Subpartition to the exiting subpartition template.
    >
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    http://docs.oracle.com/cd/E11882_01/server.112/e25523/part_admin002.htm#i1007904
    >
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    iv read the tutorial in this site http://www.w3schools.com/sql/sql_alter.asp but it is not for SQL Server 2000 DB.
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    I would double and triple check your sintax, whatch your error logs to make sure something else isn't preventing you from changing, and making sure you are logged in to the DB as a user who has the ability to alter tables.

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