Server Administration :: How To Compress Table

Sep 8, 2011

There is a huge table,i want to compress it,how can i do? alter table tb_my_table compress After executed the sql,the size of table have any change.

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Server Administration :: How To Compress Index

Oct 23, 2011

How to compress a index?

SQL> Create Table tb_compress_test
2 As
3 Select * From dba_objects;

Table created.

SQL> Create Index idx_object_id On tb_compress_test(object_id);

Index created.

SQL> Alter Index idx_object_id Move Compress;
Alter Index idx_object_id Move Compress
*
ERROR at line 1:
ORA-02243: invalid ALTER INDEX or ALTER MATERIALIZED VIEW option

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Server Administration :: Difference Between Partition Compress?

Nov 11, 2010

I am using compress partition for a large table.During the process I have used the below command for compress---

1. ALTER TABLE <TABLE_NAME> MODIFY PARTITION P1 COMPRESS;

However I found there are different command as below:-

2. ALTER TABLE <TABLE_NAME> MOVE PARTITION P1 COMPRESS;

What is the basic difference between these two as the compression is happening for both command.

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COMPRESS Option Along With CREATE TABLE

Sep 26, 2013

I am trying out the COMPRESS option along with CREATE TABLE. just wanted to understand if we need the "Advanced Compression" option enabled. Does this require extra license?

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Compress Existing Table Which Is Not Partitioned

Aug 1, 2013

Im having table which is of 45M rows table [Not partitioned], Now I want to compress the old data other than last 3Months data, I should not go for partition compress. Rarely some select queries will be fired on that Old data. Now how can I compress that table without affecting the Indexes , Dependencies proc, pkgs, Functions.   

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit ProductionPL/SQL Release 11.2.0.3.0 - Production"CORE 11.2.0.3.0 Production"

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PL/SQL :: How To Compress Multiple Files And Store In Table

Apr 9, 2013

I am having many different files and i want to use pure plsql to get these files stored as blob from a table then compress them into 1 files and store that into another table. I did some search and its like possible but didnt get conclusive solution

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Possible To Compress Existing Table In Oracle Database

Nov 29, 2012

it's possible to compress the existing table in oracle database directly.

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Server Administration :: Move Partitioned Table Between Table Spaces Of Different Block Size?

Apr 4, 2011

I was about to move some tables from one table space to another but it seems it is not possible to move partitioned tables between table spaces of different block sizes.

So far the only option I have is to export and then import back the data.

know if there is any way to move a partitioned table between table spaces of different block size?

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Server Administration :: Reorganize A Table And Index After The Deletion Of Records From Table?

Feb 7, 2012

We deleted millions of records from a table.

1.Is it necessary to reorganize a table and index after the deletion of records from table ? Because i see some change in table size after table and index reorganization.

2.Will re org table and index improve the database performance ?

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SQL & PL/SQL :: Compress Already Existing - Partitioned Index

Jul 5, 2012

Today I found myself in a situation where I needed to compress an already existing, partitioned index. First I issued an alter table to rebuild and compress the whole index:

SQL> ALTER INDEX MY_INDEX REBUILD COMPRESS;

ERROR at line 1:ORA-14086: a partitioned index may not be rebuilt as a wholeSo next I tried to rebuild compress one of the partitions:

SQL> ALTER INDEX MY_INDEX REBUILD PARTITION PART1 COMPRESS;

ERROR at line 1:ORA-28659: COMPRESS must be specified at object level first

Turns out that there is no way you can do a rebuild compress on partitioned indexes. I did not realize that until I stumbled across document 312843.1 on Metalink. It says the only way to compress a partitioned index is to drop it and recreate it (through 11.2).

My question is do we have any new feature in Oracle 11gR2 to rebuild partition indexes?

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Exadata :: Compress Sub Partition With Pctfree

Nov 12, 2012

How to compress sub partition on exadata, using 'for query high' and pctfree 10 options? I used this statement, but I get only ORA-14160:this physical attribute may not be specified for a table subpartition.

alter table table_name move subpartition subpartition_name PCTFREE 10 compress for query high;

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Server Administration :: Table Cannot Shrink?

Sep 26, 2011

My table can not shrink, why?

SQL> Alter Table tb_hxl_user Shrink Space Cascade;
Alter Table tb_hxl_user Shrink Space Cascade
*
ERROR at line 1:
ORA-10635: Invalid segment or tablespace type

SQL> desc tb_hxl_user;
Name Null? Type
----------------------------------------- -------- ----------------------------
STATEDATE NOT NULL DATE
USERNUMBER NOT NULL VARCHAR2(13)
PROVCODE NOT NULL NUMBER

[code]...

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Server Administration :: Collect Table Stats?

Oct 10, 2013

We are running 11g (11.2.0.3)We have a "working table" that is empty at the beginning of the day.Then we start adding rows (insert) with a key column called STATE with a value of 100.At the same time, there are other apps that pickup data in state 100 , process that data and change that state to 200 or 300.There is also another app that pickup data in state 200 , process that data and change that state to 300 or 400.

So in summary, the data on that table is at the beginning empty, then all the rows are in state 100, they slowly move to different states (200, 300, etc) and by the end of the day, they are all in 400.

My question is what would be the best way to collect stats on this table?

I was thinking to create an hourly job to collect stats on that table:
exec dbms_stats.gather_table_stats (
ownname => 'SCOTT',
tabname => 'WORK_T

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Server Administration :: How To Shrink Table Size

Jan 4, 2012

I have a table: desc STG_XML

Name Null Type
------------------------------ -------- ------------------------
ENTITY_ID NOT NULL VARCHAR2(100 CHAR)
ENTITY_TYPE_ID NOT NULL NUMBER
SOURCE_ID NOT NULL VARCHAR2(512 CHAR)
XML_SCHEMA_ID NOT NULL NUMBER
JOB_ID NOT NULL NUMBER
FINGERPRINT NOT NULL VARCHAR2(100 CHAR)
ENTITY_XML_DATA CLOB()
ARCHIVED NUMBER(1)
CREATION_DATE TIMESTAMP(6)
MODIFICATION_DATE TIMESTAMP(6)
ARCHIVING_DATE TIMESTAMP(6)
CREATED_BY VARCHAR2(50 CHAR)
MODIFIED_BY VARCHAR2(50 CHAR)

The problem is that the data of the table are 40GB while on the DB the table holds 400GB! How can I shrink and reuse that space except from drop/recreate and drop/import?

The table has no initial data, so that I can play with the INITIAL parameter. Data are inserted, updated and deleted all the time. I have run DBMS_ADVISOR which recommended to SHRINK table. I have performed the shrink :

alter table STG_XML shrink space COMPACT;

but I haven't gained any space.

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Server Administration :: Default Partition In Table?

Oct 17, 2011

How can i check whether a partition tbale have default partition?

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Server Administration :: Rename A Partitioned Table?

Mar 21, 2007

i want to rename a table that has partitions.

alter table
testora.oldtablename
rename to
testora.newtablename;

ORA-14048: a partition maintenance operation may not be combined with other operations

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Server Administration :: How To Apply Composite Key On A Table

Jul 21, 2011

How can i apply composite key on a table?

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Server Administration :: How To Find Updated Table

Mar 9, 2012

how to find a table is updated and when the table is updated.

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Server Administration :: DDL Used To Create A Table That Is Partitioned By Day

Nov 4, 2010

DDL used to create a table that is partitioned by day, then rolled up to a month using the interval partitioning technique.

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Server Administration :: How To Reduce Size Of A Table

Oct 2, 2012

One of our solaris machines is running Oracle 8.0.3

A table reached the 2 Gb size and oracle failed due to the operating system file size limitation.

The information in the table is not relevant and can be deleted, but the table contains a lot of indexes.

I would like to know the best procedure to delete the information and reduce the size of the file.

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Server Administration :: Table Statistics For Oracle 11g

Oct 25, 2012

I want to get the stale stats for Table resides at APPS schema. Is there is any table or view exists to get the details like DBA_STALE_STATS or anything? Currently I am checking LAST_ANALYZED column from DBA_TABLES?

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Server Administration :: How To Track The Last Access To A Table

Oct 11, 2011

is it possible to track the last access to a table?

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Server Administration :: How Table Owner Is Changed

Mar 21, 2012

I got query to investigate, how table owner is changed.

SQL> conn test/test
Connected.
SQL> create table guri(name varchar2(9));

Table created.

SQL> select table_name from user_tables;

no rows selected
SQL> conn /as sysdba
Connected.
SQL> select owner,object_name,object_type from dba_objects where object_name = 'GURI';
OWNER OBJECT_NAME OBJECT_TYPE
---------- ----------- ------------
CISREPLICA GURI TABLE

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Server Administration :: When To Gather Table Statistics

Apr 21, 2012

Why do we gather table statistics manually ?Is it because of database performance.

I know In Oracle Database 10g, Automatic Optimizer Statistics Collection reduces the likelihood of poorly performing SQL statements due to stale or invalid statistics and enhances SQL execution performance by providing optimal input to the query optimizer.

Optimizer gathers statistics when 10% table rows have been changed.

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Server Administration :: How To See Whether Table Data Using Compression

Mar 13, 2013

1)i have 2 SWP TABLES. while dropping a column, i am getting error -
ORA-39726: unsupported add/drop column operation on compressed tables.

2) when i checked compression status, those were not compressed. But as per our code standard, SWP tables should not be in compress mode.

OWNER TABLE_NAME COMPRESS COMPRESS_FOR
------------------------------ ------------------------------ -------- ------------
NOVAR PAYMENT_SWP DISABLED

OWNER TABLE_NAME COMPRESS COMPRESS_FOR
------------------------------ ------------------------------ -------- ------------
NOVAR PREPAYMENT_SWP DISABLED

3) as a workaround, i compressed these 2 SWP tables with OLTP option, and then i was able to drop the column from these 2 SWP tables.

4) Below statement is correct or not ?
IF A TABLE USING BLOCK LEVEL COMPRESSION, THEN this error will come - ORA-39726: unsupported add/drop column operation on compressed tables.

if above statement is correct, then how to find out whether table data is using block level compression ?

5) we have DBMS_COMPRESSION.GET_COMPRESSION_TYPE. using this i just tried to find out, but i am getting "1" as output. I am not getting the exact meaning of it.

confirm what is the conclusion on this ?

SQL> declare
rid rowid;
n number;
begin
select max(rowid) into rid from NOVAR.PAYMENT_SWP;
n := dbms_compression.get_compression_type('NOVAR','PAYMENT_SWP',rid);
dbms_output.put_line(n);
end;
/
2 3 4 5 6 7 8 9 1

PL/SQL procedure successfully completed.

SQL>
SQL> SET SERVEROUTPUT ON
SQL> /
1

PL/SQL procedure successfully completed.

SQL> SELECT max(rowid) from NOVAR.PAYMENT_SWP;

MAX(ROWID)
------------------
AAsz4fAHSAAAD3IABs

(ii) 2nd table

SQL> set serveroutput on
SQL> declare
rid rowid;
n number;
begin
select max(rowid) into rid from NOVAR.PREPAYMENT_SWP;
n := dbms_compression.get_compression_type('NOVAR','PREPAYMENT_SWP',rid);
dbms_output.put_line(n);
end;
2 3 4 5 6 7 8 9
10 /
1

PL/SQL procedure successfully completed.

SQL> SELECT max(rowid) from NOVAR.INVOICELINE_SWP;

MAX(ROWID)
------------------
AAsz4ZAEkAAAp8XAAA

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Server Administration :: Size Of Data Of Table

Oct 20, 2011

ops$tkyte@DEV8I.WORLD> select blocks, empty_blocks,
2 avg_space, num_freelist_blocks
3 from user_tables
4 where table_name = 'T'
5 /

BLOCKS EMPTY_BLOCKS AVG_SPACE NUM_FREELIST_BLOCKS
---------- ------------ ---------- -------------------
19 35 2810 3

Ok, the above shows us:

- we have 55 blocks allocated to the table (still)
- 35 blocks are totally empty (above the HWM)
- 19 blocks contains data (the other block is used by the system)
- we have an average of about 2.8k free on each block used.

Therefore, our table

- consumes 19 blocks of storage in total.
- of which 19 blocks * 8k blocksize - 19 block * 2.8k free = 98k is used for our data.

not too sure this calculation is accurate for getting the size (data)of the table.

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Server Administration :: Enabling Primary Key On A Big Table

Jun 22, 2012

I have a partioned table that has close to 2 billion rows and a PK of all columns. Becuase of time constrains my APP team wants the PK disabled while they pump into hundreds of thousands of rows with a batch process.

Now I am finding when I enable the PK its eating up close to close to 200GB of temp space.

Is there something I can do to reduce the amount of temp space being used?

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Server Administration :: How To Drop A Column In Huge Table

Aug 8, 2011

I want to drop a column in a huge table which contain about 420,000,000 rows,i use the alter table drop coumn command to execute,and found it takes a long time and generate huge redo.

Is there any quickly way to drop a column in a huge table?

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Server Administration :: Insert User ID Automatically In Table?

May 7, 2010

I have a table with table_ID, date_created, user_id.

I have sequence, and a BEFORE INSERT trigger, which uses the seq to increment the table_ID by 1, everytime the webpage is saved.

ques:
(1).If i have date_creted defaulted to sysdate in the table, do I need to have it in the trigger?
-- Update create_date field to current system date
:NEW.DATE_CREATED := sysdate;

(2).How can I insert the user_id in the table, each time user SAVE the page ? web page procedure is getting the user info at the beginning. can i add it in the trigger

DECLARE
v_username varchar2(10);
BEGIN

[Code]....

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Server Administration :: How To View Table Constraints Information

Mar 13, 2010

I know that you can view all constraints in a table using $USER_CONSTRAINTS or $USER_INDEXES view. What i find difficult is that the information in those views is not really well presented.

I find it very hard to follow. For example, just to find out which columns are foreign keys and which tables they refer to is really tedious. Is there a simpler way to view all the constraints especially foreign keys of a table and including which table columns they refer to in the child table.

I like to see a diagramatic representaion of all the tables involved so i like to see both the parent and the child tables, which columns are related and using which FKs etc. is there an easier way to view this information?

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