Can sub partitions be unbalanced?

I have a fact table that is partitioned by day (YYYYMMD) and by data source (a 4-character code). The table receives about 200 million records daily - 150 comes from one data source and the rest (about 50 mn) comes from 8 data sources (2 mn avg from 4 sources, 8mn avg from 4 sources). The reason this is being thought is that data from the 8 data sources are being loaded in parallel and if any fail, the entire sub partition can be truncated and data reloaded.
Is this the right partitioning strategy: composite partition - range (by day) and list subpartition (by data source), given that the sub-partitions will be very unbalanced?
Thanks for your thoughts!
Kit

Unbalanced has no meaning within the context of RANGE-LIST composite partitioning.
The records go where the partition template directs them.
If you want all of your subpartitions to contain a roughly equal number of records use RANGE-HASH.

Similar Messages

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
           );

Sub Partitioning does not have considerable impact Explain Plan

Hi Guys,
I have a table that is list - list sub partitioned on Oracle 11g - 11.2.0.3.
The first partition is on the CIRCLE_ID column and the second sub partition is on the LOAD_DTTM.
Now i have tried 2 queries on the database
1 - select MOBILENUMBER, CLOSING_BAL from GSM_PRR_SUM a1
where A1.CIRCLE_ID ='AK'
AND a1.LOAD_DTTM BETWEEN '28-MAR-2012' AND '03-APR-2012';
2 - select MOBILENUMBER, CLOSING_BAL from GSM_PRR_SUM a1
where A1.CIRCLE_ID ='AK'
AND to_char(a1.LOAD_DTTM) like '%MAR%'
Ideally the 2nd query should take a much higher time than the first query.
But the explain plan shows a difference of less than 1%.
Can you pls provide some insights as why Oracle is not understanding that subpartitioning will be faster?
Thanks,
Manish

Hi Dom
Thanks for your reply.
Is the first query using partition pruning? - Yes
Have you gathered stats, etc, etc? - No. All our queries always need to access the entire table and not a particular subset and the where criteria always uses partition and sub partition columns. so we dont see the need to collect stats. Can you pls advise what stats need to be collected and what will be the advantage of those?
Below are the output of the Explain Plan and Trace Output -
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter optimizer;
NAME TYPE VALUE
optimizer_capture_sql_plan_baselines boolean FALSE
optimizer_dynamic_sampling integer 2
optimizer_features_enable string 11.2.0.3
optimizer_index_caching integer 0
optimizer_index_cost_adj integer 100
optimizer_mode string ALL_ROWS
optimizer_secure_view_merging boolean TRUE
optimizer_use_invisible_indexes boolean FALSE
optimizer_use_pending_statistics boolean FALSE
optimizer_use_sql_plan_baselines boolean TRUE
SQL> show parameter db_file_multi;
NAME TYPE VALUE
db_file_multiblock_read_count integer 128
SQL> show parameter cursor_sharing
NAME TYPE VALUE
cursor_sharing string EXACT
SQL> column sname format a20
SQL> column pname foramt 20
SP2-0158: unknown COLUMN option "foramt"
SQL> column pname format a20
SQL> column pval2 format a20
SQL> select
2 sname
3 , pname
4 , pval1
5 ,pval2
6 from sys.aux_stats$;
from sys.aux_stats$
ERROR at line 6:
ORA-00942: table or view does not exist
SQL> explain plan for
select MOBILENUMBER, CLOSING_BAL from GSM_PRR_SUM_NEW a1
where A1.CIRCLE_ID ='KA'
AND a1.LOAD_DTTM BETWEEN '28-MAR-2012' AND '03-APR-2012'
SQL> SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);
PLAN_TABLE_OUTPUT
Plan hash value: 3032220315
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)
| Time | Pstart| Pstop |
PLAN_TABLE_OUTPUT
| 0 | SELECT STATEMENT | | 41M| 1643M| 548M(100)
|999:59:59 | | |
| 1 | PARTITION LIST SINGLE | | 41M| 1643M| 548M(100)
|999:59:59 | KEY | KEY |
| 2 | PARTITION LIST ITERATOR| | 41M| 1643M| 548M(100)
|999:59:59 | KEY | KEY |
| 3 | TABLE ACCESS FULL | GSM_PRR_SUM_NEW | 41M| 1643M| 548M(100)
|999:59:59 | KEY | KEY |
PLAN_TABLE_OUTPUT
Note
- dynamic sampling used for this statement (level=2)
14 rows selected.
SQL> explain plan for
select MOBILENUMBER, CLOSING_BAL from GSM_PRR_SUM_NEW a1
where A1.CIRCLE_ID ='KA'
AND to_char(a1.LOAD_DTTM) like '%MAR%';
2 3 4
Explained.
SQL> SQL> SQL> SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);
PLAN_TABLE_OUTPUT
Plan hash value: 189546713
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| T
ime | Pstart| Pstop |
PLAN_TABLE_OUTPUT
| 0 | SELECT STATEMENT | | 62M| 2521M| 5435M(100)|99
9:59:59 | | |
| 1 | PARTITION LIST SINGLE| | 62M| 2521M| 5435M(100)|99
9:59:59 | KEY | KEY |
| 2 | PARTITION LIST ALL | | 62M| 2521M| 5435M(100)|99
9:59:59 | 1 | 305 |
|* 3 | TABLE ACCESS FULL | GSM_PRR_SUM_NEW | 62M| 2521M| 5435M(100)|99
9:59:59 | KEY | KEY |
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
3 - filter(TO_CHAR(INTERNAL_FUNCTION("A1"."LOAD_DTTM")) LIKE '%MAR%')
Note
PLAN_TABLE_OUTPUT
- dynamic sampling used for this statement (level=2)
19 rows selected.
SQL>
SQL> SET AUTOTRACE TRACEONLY ARRAYSIZE 100
SQL> select MOBILENUMBER, CLOSING_BAL from GSM_PRR_SUM_NEW a1
where A1.CIRCLE_ID ='KA'
AND a1.LOAD_DTTM BETWEEN '28-MAR-2012' AND '03-APR-2012' 2 3 ;
49637012 rows selected.
Execution Plan
Plan hash value: 3032220315
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)
| Time | Pstart| Pstop |
| 0 | SELECT STATEMENT | | 41M| 1643M| 546M(100)
|999:59:59 | | |
| 1 | PARTITION LIST SINGLE | | 41M| 1643M| 546M(100)
|999:59:59 | KEY | KEY |
| 2 | PARTITION LIST ITERATOR| | 41M| 1643M| 546M(100)
|999:59:59 | KEY | KEY |
| 3 | TABLE ACCESS FULL | GSM_PRR_SUM_NEW | 41M| 1643M| 546M(100)
|999:59:59 | KEY | KEY |
Note
- dynamic sampling used for this statement (level=2)
Statistics
0 recursive calls
7 db block gets
530220 consistent gets
33636 physical reads
0 redo size
644311477 bytes sent via SQL*Net to client
5460594 bytes received via SQL*Net from client
496372 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
49637012 rows processed
SQL> SET AUTOTRACE TRACEONLY ARRAYSIZE 100
SQL> select MOBILENUMBER, CLOSING_BAL from GSM_PRR_SUM_NEW a1
where A1.CIRCLE_ID ='KA'
AND to_char(a1.LOAD_DTTM) like '%MAR%' 2 3
4 ;
219166976 rows selected.
Execution Plan
Plan hash value: 189546713
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| T
ime | Pstart| Pstop |
| 0 | SELECT STATEMENT | | 228M| 9155M| 3552M(100)|99
9:59:59 | | |
| 1 | PARTITION LIST SINGLE| | 228M| 9155M| 3552M(100)|99
9:59:59 | KEY | KEY |
| 2 | PARTITION LIST ALL | | 228M| 9155M| 3552M(100)|99
9:59:59 | 1 | 274 |
|* 3 | TABLE ACCESS FULL | GSM_PRR_SUM_NEW | 228M| 9155M| 3552M(100)|99
9:59:59 | KEY | KEY |
Predicate Information (identified by operation id):
3 - filter(TO_CHAR(INTERNAL_FUNCTION("A1"."LOAD_DTTM")) LIKE '%MAR%')
Note
- dynamic sampling used for this statement (level=2)
Statistics
38 recursive calls
107 db block gets
2667792 consistent gets
561765 physical reads
0 redo size
2841422984 bytes sent via SQL*Net to client
24108883 bytes received via SQL*Net from client
2191671 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
219166976 rows processed
SQL>
Thanks,
Manish

Add sub partition on another column in oracle

I have a table which has two partitions (by range): first_half and second_half based on a column "INSERT_DAY".
I need to add subpartitions "SUCCESS" and "NONSUCCESS" based on the values of another column "STATUS" (subpartition by list) i.e. I need to transform my range partition to composite (range-list) partition.
I do not wish to drop existing tables or partitions. What is the ALTER query for this?
PS: The database is Oracle 9i

Ok, my bad. The project is about charging GPRS customers for data usage.
Here is the real DDL:
CREATE TABLE CDR_EVENT_RCD_FILE_MOB_AGG
   (    "MOBILE_NO" VARCHAR2(16 BYTE),
    "DATA_VOLUME" NUMBER(*,0),
    "CHARGE" NUMBER(*,0),
    "RECORD_COUNT" NUMBER(*,0),
    "COUNTER" NUMBER(*,0) DEFAULT 0,
    "INSERT_DAY" NUMBER(*,0),
    "MAX_FILE_SEQ_NO" NUMBER(*,0),
    "MIN_FILE_SEQ_NO" NUMBER(*,0),
    "REQUEST_ID" VARCHAR2(21 BYTE),
    "TRANSACTION_ID" VARCHAR2(21 BYTE),
    "RESPONSE_TIME" TIMESTAMP (6),
    "RETURN_CODE" CHAR(2 BYTE),
    "FAILURE_REASON" VARCHAR2(1024 BYTE),
    "CHARGED_AMOUNT" NUMBER(*,2)
PARTITION BY RANGE ("INSERT_DAY")
(PARTITION "FIRST_HALF" VALUES LESS THAN (16) ,
PARTITION "SECOND_HALF" VALUES LESS THAN (MAXVALUE) ) ;
CREATE INDEX "CDRDEVTBS"."MAX_FILE_SEQ_NO_INDEX" ON "CDRDEVTBS"."CDR_EVENT_RCD_FILE_MOB_AGG" ("MAX_FILE_SEQ_NO") ;
CREATE INDEX "CDRDEVTBS"."MOBILE_NO_INDEX" ON "CDRDEVTBS"."CDR_EVENT_RCD_FILE_MOB_AGG" ("MOBILE_NO") ;
As you can see, it is partitioned by range on "Insert_day".
The requirement is to delete all the records having counter=3 (which means successful charging) for the records which are older than 15 days.
So I thought, why not create sub partitions with counter so that final DDL would be something like the following. I would then avoid writing a DELETE query, which would take a lot of time to execute.
CREATE TABLE CDR_EVENT_RCD_FILE_MOB_AGG (
    insert_day INT,
    counter INT,
--other columns
PARTITION BY RANGE (insert_day)
SUBPARTITION BY LIST(counter)
SUBPARTITION TEMPLATE
    SUBPARTITION SUCCESS VALUES(3),
    SUBPARTITION NONSUCCESS VALUES(DEFAULT)
    PARTITION first_half VALUES LESS THAN (16),
    PARTITION second_half VALUES LESS THAN (maxvalue)
So that I could execute queries:
alter table CDR_EVENT_RCD_FILE_MOB_AGG truncate subpartition first_half_success; --execute on last day of every month
alter table CDR_EVENT_RCD_FILE_MOB_AGG truncate subpartition second_half_success; -- execute on 16th day of every month
to remove unnecessary records.
I would like to create subpartitions without dropping the existing table.

Create local spatial index on range sub-partitions?

Is is possible to create a local spatial index on a table with range sub-partitions? We're trying to do this on a table that contains lots of x,y,z point data.
Trying to do so gives me the error: ORA-29846: cannot create a local domain index on a composite partitioned tableAccording to the spatial documentation:The following restrictions apply to spatial index partitioning:
- The partition key for spatial tables must be a scalar value, and must not be a spatial column.
- Only range partitioning is supported on the underlying table. All other kinds of partitioning are not currently
supported for partitioned spatial indexes.So there is nothing saying it can or can't be done. The examples I've seen in the documentation tend to partition based on a single value and don't use subpartitioning.
Example of what we're trying to do:SQL> SELECT * FROM V$VERSION;
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE    11.1.0.7.0      Production
TNS for 64-bit Windows: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - Production
SQL>
SQL> --- Create a table, partioned by X and subpartitioned by Y
SQL> CREATE TABLE sub_partition_test
2 (
3      x               NUMBER,
4      y               NUMBER,
5      z               NUMBER,
6      geometry        MDSYS.SDO_GEOMETRY
7 )
8 PARTITION BY RANGE (x)
9 SUBPARTITION BY RANGE (y)
10     (
11     PARTITION p_x100 VALUES LESS THAN (100)
12     (
13                     SUBPARTITION sp_x100_y100 VALUES LESS THAN (100),
14                     SUBPARTITION sp_x100_y200 VALUES LESS THAN (200),
15                     SUBPARTITION sp_x100_yMAXVALUE VALUES LESS THAN (MAXVALUE)
16     ),
17     PARTITION p_x200 VALUES LESS THAN (200)
18     (
19                     SUBPARTITION sp_x200_y100 VALUES LESS THAN (100),
20                     SUBPARTITION sp_x200_y200 VALUES LESS THAN (200),
21                     SUBPARTITION sp_x200_yMAXVALUE VALUES LESS THAN (MAXVALUE)
22     ),
23     PARTITION p_xMAXVALUE VALUES LESS THAN (MAXVALUE)
24     (
25                     SUBPARTITION sp_xMAXVALUE_y100 VALUES LESS THAN (100),
26                     SUBPARTITION sp_xMAXVALUE_y200 VALUES LESS THAN (200),
27                     SUBPARTITION sp_xMAXVALUE_yMAXVALUE VALUES LESS THAN (MAXVALUE)
28     )
29 );
Table created.
SQL>
SQL> -- Insert some sample data
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (1, 1, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(1, 1, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (50, 150, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(50, 150, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (150, 150, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(150, 150, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (150, 250, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(150, 250, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (150, 300, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(150, 300, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (220, 210, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(220, 210, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (220, 150, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(220, 150, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (220, 250, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(220, 250, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (220, 300, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(220, 300, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (320, 250, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(320, 250, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (320, 160, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(320, 160, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (320, 290, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(320, 290, 50), NULL, NULL));
1 row created.
SQL> INSERT INTO sub_partition_test (x, y, z, geometry)
2 VALUES (320, 320, 50, SDO_GEOMETRY(3001, 2157, SDO_POINT_TYPE(320, 320, 50), NULL, NULL));
1 row created.
SQL>
SQL> -- Create some metadata
SQL> DELETE FROM user_sdo_geom_metadata WHERE TABLE_NAME = 'SUB_PARTITION_TEST';
1 row deleted.
SQL> INSERT INTO user_sdo_geom_metadata VALUES ('SUB_PARTITION_TEST','GEOMETRY',
2 SDO_DIM_ARRAY(
3     SDO_DIM_ELEMENT('X', 0, 1000, 0.005),
4     SDO_DIM_ELEMENT('Y', 0, 1000, 0.005)
5 ), 262152);
1 row created.
SQL>
SQL> -- Create an Unusable Local Spatial Index
SQL> CREATE INDEX sub_partition_test_spidx ON sub_partition_test (geometry)
2    INDEXTYPE IS MDSYS.SPATIAL_INDEX
3 LOCAL
4 UNUSABLE;
CREATE INDEX sub_partition_test_spidx ON sub_partition_test (geometry)
ERROR at line 1:
ORA-29846: cannot create a local domain index on a composite partitioned tableThanks,
John

Ok, thanks. That's what we're planning on doing now.
SQL> CREATE TABLE partition_test
2 (
3      x               NUMBER,
4      y               NUMBER,
5      z               NUMBER,
6      geometry        MDSYS.SDO_GEOMETRY
7 )
8 PARTITION BY RANGE (x, y)
9     (
10     PARTITION p_x100y100 VALUES LESS THAN (100, 100),
11     PARTITION p_x100y200 VALUES LESS THAN (100, 200),
12     PARTITION p_x100yMAX VALUES LESS THAN (100, MAXVALUE),
13     PARTITION p_x200y100 VALUES LESS THAN (200, 100),
14     PARTITION p_x200y200 VALUES LESS THAN (200, 200),
15     PARTITION p_x200yMAX VALUES LESS THAN (200, MAXVALUE),
16     PARTITION p_x300y100 VALUES LESS THAN (300, 100),
17     PARTITION p_x300y200 VALUES LESS THAN (300, 200),
18     PARTITION p_x300yMAX VALUES LESS THAN (MAXVALUE, MAXVALUE)
19 );
Table created.
SQL>
SQL> INSERT INTO user_sdo_geom_metadata VALUES ('PARTITION_TEST','GEOMETRY',
2     SDO_DIM_ARRAY(
3        SDO_DIM_ELEMENT('X', 0, 1000, 0.005),
4        SDO_DIM_ELEMENT('Y', 0, 1000, 0.005)
5     ), 262152);
1 row created.
SQL> CREATE INDEX partition_test_spidx ON partition_test (geometry)
2     INDEXTYPE IS MDSYS.SPATIAL_INDEX
3 LOCAL
4 UNUSABLE;
Index created.

How to move partitions/sub-partitions into a different tablespace?

Hi Uisng oracle 1..20.3 and have a range-hash partitioned table using interval partitioning - code below.
Works fine just one problem.
we wish to move the system geneerated partitions to different tablespaces later and also rename th epartitions.
When try assign partition to a different tablespace get the folloiwng message
alter table por_rt move partition SYS_P2283 tablespace bi_dw_data
get message ora-14257 - cannot move partition other than range,list, system or hash partition.
How can we avoid this.
We we need to move all the subpartitions first?
Tried this
alter table move subpartition SYS_SUBP2269 tablespace bi_dw_data;
but get message ora-01735 message invalid statement
-- Create table
create table POR_RT
plant_issue_id    NUMBER not null,
pf_run_num        NUMBER,
partitioning_date DATE
partition by range (PARTITIONING_DATE)
subpartition by hash (PLANT_ISSUE_ID)
partition PART_200912 values less than (TO_DATE(' 2010-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    tablespace BI_SUPPORT_DATA
    pctfree 10
    initrans 1
    maxtrans 255
    subpartition SYS_SUBP2261 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2262 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2263 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2264 tablespace BI_SUPPORT_DATA
partition PART_201001 values less than (TO_DATE(' 2010-02-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    tablespace BI_SUPPORT_DATA
    pctfree 10
    initrans 1
    maxtrans 255
    subpartition SYS_SUBP2265 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2266 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2267 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2268 tablespace BI_SUPPORT_DATA
partition SYS_P2273 values less than (TO_DATE(' 2010-03-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    tablespace BI_SUPPORT_DATA
    pctfree 10
    initrans 1
    maxtrans 255
    subpartition SYS_SUBP2269 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2270 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2271 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2272 tablespace BI_SUPPORT_DATA
partition SYS_P2283 values less than (TO_DATE(' 2010-07-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    tablespace BI_SUPPORT_DATA
    pctfree 10
    initrans 1
    maxtrans 255
    subpartition SYS_SUBP2279 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2280 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2281 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2282 tablespace BI_SUPPORT_DATA
partition SYS_P2278 values less than (TO_DATE(' 2010-08-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    tablespace BI_SUPPORT_DATA
    pctfree 10
    initrans 1
    maxtrans 255
    subpartition SYS_SUBP2274 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2275 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2276 tablespace BI_SUPPORT_DATA,
    subpartition SYS_SUBP2277 tablespace BI_SUPPORT_DATA
);Edited by: user5716448 on 22-Mar-2013 04:49

you can not move composite parition directly you need to move subpartition using this statments
alter table <tablename> move subpartition <sub partition name > tablespace <tablespace name>;
than change partition tablespace using
ALTER TABLE <table name> MODIFY DEFAULT ATTRIBUTES FOR PARTITION      <partition name> TABLESPACE <tablespace name>;

Corrupted Sub partitions

Oracle v8.1.6.3
The table has 36 major partitions with 32 subs in each part. When we attempt to analyze a specific partition (P2003_05)in a table with 32 sub-partitions, we receive a ORA-3113 error. We know that this is a bogus error because we can analyze all the other partitions and sub-partitions without incident. This is the second time we have had a partition that will need to be exported, truncated and imported before it can be analyzed. I have absolutely no idea what causes this. Any ideas?

This forum is for posting feedback about the OTN site.
The best place for your question is probably a Database forum, perhaps the General Database Discussions forum.

Do I need to use all the hard drive for time machine or can I partition it

Do I need to use all the hard drive for time machine or can I partition it

You cannot partition a TC disk.
See pondini about mixing data and backups.. but remember this.. the TC has no way to back itself up and TM cannot backup files on the TC. Anything not backed up on the TC will be lost at some future point.
http://pondini.org/TM/TCQ3.html

Can I partition a hard drive so that one partition is for windows files and the other is for time machine backups?

I have a 1TB WD passport that currently contains windows files e.g photos, documents, etc. Can I partition it so that one partition contains these files and the other partition is used for time machine backups? Also, how do I change the partition system on the hard drive so that it uses the GUID partition system?
Thanks in advance.

Yes, you can, though you need to format and partition the drive from the scratch.
1) back up your PC data on other drive.
2) partitioning your drive into 2 partitions with Disk Utility.
3) format one partition by Mac OS extended (journaling) for Time Machine, the other by exFAT for PC data.
4) restore PC data on exFAT partitioned drive.

Can I partition an external drive into MSDO and MACOS extended and use under bootcamp ?

I am interested in using Windows 8 alongside my OSX MAVERICK with the Bootcamp 5 solution.
However, I am trying to save the space on my internal SSD . Can I partition my 4TB WD external drive into 3 parts like this :
1.5 TB dedicated for Time Machine in MAC OS Extended Format
1,5 TB MAC for general purpose in MAC OS Extended Format
1.0 TB Windows for my PC games and other stuff in exFAT for files larger than 4GB
Is this possible at all or what would be better ?
Thanks

To resize the drive do the following:
1. Open Disk Utility and click on the Continue button. Select the hard drive's main entry then click on the Partition tab in the DU main window.
2. You should see the graphical sizing window showing the existing partitions. A portion may appear as a blue rectangle representing the used space on a partition.
3. In the lower right corner of the sizing rectangle for each partition is a resizing gadget. Select it with the mouse and move the bottom of the rectangle upwards until you have reduced the existing partition enough to create the desired new volume's size. The space below the resized partition will appear gray. Click on the Apply button and wait until the process has completed. (Note: You can only make a partition smaller in order to create new free space.)
4. Click on the [+] button below the sizing window to add a new partition in the gray space you freed up. Give the new volume a name, if you wish, then click on the Apply button. Wait until the process has completed.
You should now have a new volume on the drive.
It would be wise to have a backup of your current system as resizing is not necessarily free of risk for data loss. Your drive must have sufficient contiguous free space for this process to work.

Can I partition an external drive and install 10.6.8 so I can run some older software?

I have older software that won't run on my 21.5 iMac. Can I partition a 3TB Lacie external drive, then install 10.6.8 on it so I can use the older software?

The computer that I purchased did come with Parallels Desktop 10 for Mac, but I thought that was only for running some Windows software. Not a clue how to use it.
I actually asked a similar question about installing the older system on the external drive when I talked to Apple yesterday. They guy said go ahead and try it! Huh?

Can´t install windows 8.1 because boot camp can't partition the disk. I´ve follow many tips but they did´t work

I can´t install windows 8.1 because boot camp can't partition the disk. I´ve follow many tips but they did´t work (backup, reinstall os, erase space, etc.)
Macbook pro retina
os x yosemite 10.10.2
Thanks

There are several possibilities.
1. You do not have contiguous free disk space.
2. BCA has failed, or you may have a Fusion drive which is causing problems.
3. You have incorrect permissions on the disk.
4. Can you boot in OS X Safe Mode - OS X: What is Safe Boot, Safe Mode? - Apple Support?

Can I partition my hard drive to hold Windows 8 (Beta), instead of Windows 7, and can I do this with an external CD drive?

I have a late 2008 Macbook Pro with Mac OS X 10.8 Mountain Lion installed, but my CD drive inside my computer is damaged*, and it's far cheaper to buy an external CD drive than to repair it entirely. Before I do either, I would like some grasp of whether or not it's worth my time and money, as I've yet to order the external drive or make a genius bar appointment.
Also, the reason I'm choosing Windows 8 (Beta) is because it's free.
*I dropped my computer once two years ago. I haven't even used my CD drive until recently when trying to install Windows 8. I assume the drop was the issue. I've used compressed air to remove dirt/dust as well as resetting the PRAM multiple times and nothing seems to work, but I'm not worried about it.
Thank you.

Can I partition my hard drive to hold Windows 8 (Beta), instead of Windows 7, and can I do this with an external CD drive?
No and No.
1: Apple only supports Windows 7 at this time in BootCamp (direct install into a bootable partition) because Win 8 is in Beta and no Mac hardware drivers are available yet from Apple for Windows 8.
2: You can't install Windows from a external cd drive into BootCamp, it has to be a internal one far as I know, perhaps a USB will work I don't know.
Yes:
1: You can download and install Windows 8 Beta into a the free virtual machine software called VirtualBox, which Windows 8 will run in a window in OS X. This is better as it's still in Beta and Windows Beta releases will expire. Plus Windows 8 is a pain in the behind and you will want to be able to have VirtualBox or OS X be able to regain control over the computer.
http://osxdaily.com/2012/03/03/try-windows-8-consumer-preview-virtualbox/
Windows in BootCamp or Virtual Machine?

I've just bought a new iMac with 2 TB hard drive. Can I partition the startup drive?

I've just bought a new iMac with 2 TB hard drive. Can I partition the startup drive?

Glenfern wrote:
The reason I'm considering partitioning is - I'm going to transfer about 50 GB of family photos & music to the iMac. Over time the photos & music library is going to grow. My idea was to point the iphoto & itunes library to the new partition so that the application programs (that will will reside in partition 1), will not get congested with photos & music over time & degrade performance. Also, I dabble a little bit with the music editing program LOGIC & Sound Track Pro, which creates lots of little music files in the process.
In your case I would strongly recommend against partitioning, as dwb mentions a drive loaded with data on an
O SX system doesn't equate to performance loss. However partitioning does. If you were going to tell me you were partitioning to load different OS's on the computer then you would have a good reason to think about partitioning. My suggestion is do not partition.
What I would also recommend is getting some high quality high speed external HD's to store your photo and music libraries on. This helps keept the 2GB drive available while maintaining performance. I have 3 external HD's attached to my iMac, two are backup drives (1 Time Machine & 1 Bootable Clone) the third drive is for storing my my music, photo & movie libraries on. If you go this route the 3 drives I'd recommend are:
http://g-technology.com/products/g-drive.cfm
http://eshop.macsales.com/shop/firewire/1394/USB/EliteAL/eSATA_FW800_FW400_USB
http://www.lacie.com/us/products/product.htm?id=10330
Personally I use the Lacie's however OWC or G-Tech would also be welcome on my desk.
Again if you want to take this path Apple has instructions for how to move the libraries to EHDs, if you want those links let me know.

How can I partition my external hard drive supporting mac OS in one partition and windows OS in another?

Hello everyone, how can I partition my external hard drive supporting mac OS in one partition and windows OS in another?

OK. Start with:
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to two (2). Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Click on the Erase tab in DU's main window. Select one of the two partitions, preferably the first one, change the Format type: to MSDOS then click on the Erase button.

Can sub partitions be unbalanced?

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