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

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

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
           );

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

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.

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
- Renaming the new table to the name used by the old table
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

I can't create partition on my MacBook Pro

I don't see anywhere create partiiton. divers equal and install. I see normal on youtube. Now i see direct install. I can't create partition on my MacBook Pro
How can i do?

Read and follow the Bootcamp instructions http://www.apple.com/support/bootcamp/

Partitioning an already existing table

Hi,
I need to partition many existing tables. All these tables hold more than 50 million data each.
Since i am new to partitioning, can any one kindly guide what are the best practices one should look for under such circumstances.
Is it neccessary to dwell on the following point
1) Type of table (Heap or IOT etc).
2) Indexes and kinds of indexes along with the columns in which they are defined.
3) Block size
4) Constraints
5) Row Chaining, Migration etc.
I have very basic idea about the above mentioned points.
Please guide me as to how should the partitioning be done, what sort of partitioning is best, any performace issues.
I sincerely appreciate the cooperation of all members.
Thanks in advance
Message was edited by:
Master

Hi,
to create a partitioned table from the non portioned table
create table part partition XXXXXXXX
(partition p01 tablespace XX1,
partition p02 tablespace XX2,
partition p03 tablespace XX3,
partition p04 tablespace XX 4
nologging
as select * from old data ;
OR
export the old non partition table data – rename the non partitioned table, create partitioned table import the data
OR
Exchanging Partitions
You can convert a partition (or sub partition) into a non-partitioned table, and a non-partitioned table into a partition (or sub partition) of a partitioned table by exchanging their data segments. You can also convert a hash-partitioned table into a partition of a range-hash partitioned table, or convert the partition of the range-hash partitioned table into a hash-partitioned table. Similarly, you can convert a list-partitioned table into a partition of a range-list partitioned table, or convert the partition of the range-list partitioned table into a list-partitioned table
One of the great features about partitioning, and most specifically range-based partitioning, is the ability to load in new data quickly and easily with minimal impact on the current users. The manuals indicate that the critical command to achieve this is as follows:
alter table pt_tab1 exchange partition p_9999
with table new_data
Ani

How to create a partiotion for existing table

Hi,
There ia one table in database with data. I want to create a partion for this table. data loss of data is not an issue.
Please provide the query for this.
Regards,
Venki

An existing non-partitioned table cannot be partitioned. You will have to create a new, partitioned table and move the data (if you care to keep it) from the old table to the new table, potentially followed by dropping the old table and renaming the new table to use the old table name.
If you do not have a downtime window to accomplish this, you can use DBMS_REDEFINITION to assist. That, however, is just adding a bit of extra complexity on top of the basic procedure in order to support users accessing the table while you're building the new table. Unless your downtime window is insufficient to accomplish the move manually, I wouldn't bother with DBMS_REDEFINITION.
Justin

RMBP Mid 2014 Windows 7 installer can't create partitions

Hi all,
I have a late 2014 Retina Macbook Pro with 1TB SSD and Intel Iris Graphics (no nVidia). It has been updated to Yosemite 10.10.2.
So for I had good luck installing Windows 8.1 Professional on it via the bootcamp assistant from a USB key. Unfortunately, due to work requirements, I need Windows 7 (compatible VPN clients and proprietary software at a customer). Windows 7 Professional SP1 however won't cooperate. For the record, I off course removed Windows 8.1 first again via BCA.
First problem was that the 16GB Lexar Jumpdrive I used to install Win 8.1 didn't want to boot when it was created by BCA for Windows 7. Even when holding the Option key at boot, it didn't even show in the boot options. Very weird. This was quickly solved by using an 8GB Kingston Datatraveller stick instead which boots fine.
The BCA does all its stuff correctly then but when booting into Windows 7 and starting the install, the Windows installer first complains it must format the bootcamp partition as NTFS. If I then do that, the installer complains it can't create additional partitions.
OK so let's format it to NTFS. Gone is the BOOTCAMP label.
But Windows refuses to install anyway.
I do not have any additional USB drives inserted, nor is there a Superdrive present. Apple support page said to remove any Thunderbolt devices but there are none.
I have looked for similar threads but the reports there are about the fusion drives in the new 5K iMac and Windows 8.1.
So far I have also tried to format the bootcamp partition as ExFat as suggested in other threads but this makes the Windows 7 installer complain it needs additional drivers for CD/DVD and refuses to install.
This is what I see when I hold the Option key during startup when BCA has created the partition and the USB install drive is inserted:
So I'm kind of out of options. Any help or hint would be appreciated!

So this is quite embarrassing. I had already deleted the Windows 7 partition via BCA so to answer your question Loner T, I started BCA again. Unticked create USB installer and download support software and only let it create the Windows 7 partition again. The only difference with last time: I choose 149GB instead of 102GB (thanks to the bloody difficult slider in the BCA).
After bootup of the USB key the install went fine and now I'm looking at a running Windows 7 on my rMBP
Problem is: I have no idea how I solved it. What I did before I posted my question:
- Partition size was 102GB vs 149GB now
- The previous BOOTCAMP partition was erased and reformatted by DiskUtility in ExFat
- It was then removed by BCA
Could this have reset the out of sync MBR vs GPT?
Anyway, it works. Here's the output of the commands:
sudo gpt -vv -r show /dev/disk0
gpt show: /dev/disk0: mediasize=1000555581440; sectorsize=512; blocks=1954210120
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 1954210119
       start        size index contents
           0           1         MBR
           1           1         Pri GPT header
           2          32         Pri GPT table
          34           6
          40      409600      1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
      409640 1661515288      2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
1661924928     1269536      3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
1663194464         672
1663195136   291014656      4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1954209792         295
1954210087          32         Sec GPT table
1954210119           1         Sec GPT header
sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 121643/255/63 [1954210120 sectors]
Signature: 0xAA55
         Starting       Ending
#: id cyl hd sec - cyl hd sec [     start -       size]
1: EE 1023 254 63 - 1023 254 63 [         1 -     409639] <Unknown ID>
2: AC 1023 254 63 - 1023 254 63 [    409640 - 1661515288] <Unknown ID>
3: AB 1023 254 63 - 1023 254 63 [1661924928 -    1269536] Darwin Boot
*4: 07 1023 254 63 - 1023 254 63 [1663195136 - 291014656] HPFS/QNX/AUX
So I don't really know what I did to solve this... Maybe one of the utils synced the MBR and GPT again?

Logical type Partition of an existing table

Dear All,
My database is 10gR2 and Linux is the operating system.
One of my table in production database is huge and contains lot of data. Table is growing on daily basis. There are many queries that users execute on this table and the criteria of selection is normally entry date of the record, its a field Entrty_Date with date datatype.
I want logical partition on this table in such a way, that the table name remains the same, and data is partitioned logically.
Like if the Entry_Date is starting from 2005, a partition is made on the criteria:
2005-2006
2006-2007
2011When user query for records having entry date > 2011... the query is made only this chunk of the table, making the query fast.
I hope I am able to make you understand my problem. If its possible in Oracle please let me know the name of the method and I will RND on this one. And I have to do it on existing table that contains lot of data.
Thanks,
Imran

For example:
CREATE TABLE sales
( prod_id NUMBER(6)
, cust_id NUMBER
, time_id DATE
, channel_id CHAR(1)
, promo_id NUMBER(6)
, quantity_sold NUMBER(3)
, amount_sold NUMBER(10,2)
PARTITION BY RANGE (time_id)
( PARTITION sales_q1_2006 VALUES LESS THAN (TO_DATE('01-APR-2006','dd-MON-yyyy')) TABLESPACE tsa
, PARTITION sales_q2_2006 VALUES LESS THAN (TO_DATE('01-JUL-2006','dd-MON-yyyy')) TABLESPACE tsb
, PARTITION sales_q3_2006 VALUES LESS THAN (TO_DATE('01-OCT-2006','dd-MON-yyyy')) TABLESPACE tsc
, PARTITION sales_q4_2006 VALUES LESS THAN (TO_DATE('01-JAN-2007','dd-MON-yyyy')) TABLESPACE tsd
);

How to create a cluster on existing table

how to create a cluster on existing table

user8949393 wrote:
how to create a cluster on existing tableAFAIK you can't. You have to create the cluster from scratch, something like
--cluster key can be just one column also
CREATE CLUSTER s_emp_dept_ic (deptno NUMBER(7), dname varchar2(30));
CREATE TABLE emp(
DEPTNO NUMBER(7),
DNAME VARCHAR2(30),
EMPNO NUMBER(4),
ENAME VARCHAR2(30)
--cluster clause puts table in cluster. Deptno, dname are table columns in
--cluster key
CLUSTER s_emp_dept_ic (deptno,dname);
--a cluster index must be created before any data is inserted
--the index columns used come from the cluster key from CREATE CLUSTER
CREATE INDEX s_emp_idx ON CLUSTER s_emp_dept_ic;

How can you create a layer under a table?

If anyone knows how- or can send me a linkon how to create a
layer under a table.
Great help!!
ty

Except that z-index of 2 will appear HIGHER in the
z-coordinate than a
z-index of 1. But we still don't know if that's what OP meant
by "under".
Murray --- ICQ 71997575
Adobe Community Expert
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"L. Simon" <[email protected]> wrote in
message
news:fbpj5r$89p$[email protected]..
> This would be my first attempt:
>
quote:
> <div style="z-index:1">
> .... table content...
> </div>
>
> <div id="stuffunderatable" style="z-index:2">
> ... whatever you want under the table>
> </div>
>
> <style type="text/css">
> #stuffunderatable {
> position:absolute;
> top:45px;
> left:45px;}
> </style>
>
> Note that the 45px numbers are out of thin air, and
you'll need to adjust
> it
> to get the layer to appear where you want on your page.
>

Tecra R10-10W - Can't create partition during installation

I got Tecra R10-10W and I switched from Vista to XP. I used Windows XP Toshiba recovery disk for this.
I was not able to create partition on hdd during the installation.
I wonder did I miss something?
How can I split my hdd into 2 parts? Should I re-install XP for it?
Please help me?
Thanks,
Alper

Hi!
As Akuma wrote its not possible to create or change HDD partitions during the Toshiba recovery installation.
The Toshiba recovery disk contains an image of factory settings and after this you can change the partition size yourself.
I also use Partition Magic and it works really good. If you dont have this tool you can Google for a freeware tool. ;)
Bye

Creating partition on my existing HD

How do I create partition on my Macintosh HD without have to reformat all the hard drive and loosing my existing data? Any suggestion on reliable software to do this?
Thanks

I haven't used these, but each will do a non-destructive partition:
http://www.coriolis-systems.com/iPartition.php
http://www.subrosasoft.com/OSXSoftware/index.php?mainpage=product_info&productsid=6
http://www.micromat.com/index.php?option=com_content&task=view&id=33&Itemid=54

Can we create partitions in an existing table?

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