sudhakar

• Sep 25th, 2011

1- When BEGIN BACKUP is issued: The hot backup flag in the datafile headers is set, so that the copy is identified to be a hot backup copy. This is to manage the backup consistency issue when the cop...

tykarthick

 Profile Answers by tykarthick Questions by tykarthick

• Oct 6th, 2009

Sql>alter database begin backup;The above query is used to freeze the header of all datafiles belongs to tablespace in that particular database.Freeze means lock i.e during backup no data's wil...

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Neo

• Oct 11th, 2011

Whats the process of refresh ? ( I mean steps). Do you export/import or we take a differential backup and restore on test DB ? Any links to an article will be of great help.

dsp

• Aug 18th, 2011

Hi, There is little diff between them. First we clone the d.b totally(homepath,datafiles,data.....etc) from Prod to Test, where as in D.B Refresh we just refresh the additional data which is in p...

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Harieshsivam

 Profile Answers by Harieshsivam Questions by Harieshsivam

• Oct 13th, 2011

Show sga;

we can see the memory of SGA space

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Take cold backup and recover

shoaib1786

 Profile Answers by shoaib1786 Questions by shoaib1786

• Nov 5th, 2011

Just create the datafile with same location mention in ur controlfile and recover the datafile ... Its simple.

naveen

• Sep 19th, 2011

Alter database create datafile 'and give the datafile location and /name' by using this command we can recover the datafile without backup also

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Should you take the backup of Logfiles if the database is running in ARCHIVELOG mode?

Shaikh Ziya

• Nov 22nd, 2011

Yes We can Take of Controlfile Online Mode Just
Fire The Command alter database backup controlfile trace And
alter database backup controlfile as trace '/Location where u want 2 take backup of ctlfile/';

sulbha singh

• Sep 22nd, 2011

No, we can not take backup of redo log files even database is running in archive log mode because of inconsistency

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Why we use Sort_area_size parameter in init.ora file?Kindly let me know?

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Dec 7th, 2011

SORT_AREA_SIZE is one of the deferred Oracle Server Parameters which is set in init.ora. Its value as bytes (integer) sets the size of in-memory sort work area. The default is 64K and the maximum valu...

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Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Dec 7th, 2011

Online backup also known as hot backup / open backup can be performed even the database is open and while users are working and is available for read and write activity. To perform Online backup, the ...

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Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Dec 7th, 2011

You can make use of VSIZE function to get the number of bytes in the internal representation of individual field. However this cannot be applied on fields that has BLOB data type and in such case you have to use dbms_lob.getlength function on BLOB data type field.

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What is the query to change the rows into column and columns into row

oracle2066

 Profile Answers by oracle2066 Questions by oracle2066

• Dec 28th, 2011

Alter table A add column address1 varchar2(10);

Manas Kumar Hati

• Oct 31st, 2011

Unsing Pivot Query

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SHIMAR

• Apr 17th, 2012

DDL is used to create, alter and truncate
DML is used to insert, update, delete and drop

Venki

• Dec 19th, 2011

DDL means "Data Definition Language". SELECT, UPDATE, INSERT belong to DML, which is "Data Modification Language". DDL is all the other commands -- for example, CREATE TABLE.

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I am new here and i am not sure if I am posting this in the correct place. But I have recently started studying to be a programmer but because there is so much out there between these two I am getting more and more confused about how to answer this. Could someone please answer these so I can at least get my head around it all? Thank you!! This is what the questions are:

After initial...

Tom Haughey

 Profile Answers by Tom Haughey Questions by Tom Haughey

• Apr 30th, 2012

I will refer predominantly to Relational DBMS. In a file system, data is contained in a flattened structure that is often a variable length structure. For example, a shipment received could contain th...

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Chintan

• May 29th, 2012

DDL is Auto Commited Statements.

cmanne

 Profile Answers by cmanne Questions by cmanne

• Mar 25th, 2007

There is no need to issue commit command after executing DDL statements as the DDL statements are commited automatically

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mary

• Jun 7th, 2012

Backup can be taken in 3 ways 1)Cold backup 2)Hot Backup 3)RMAN Backup 1)For taking cold backup we need to shutdown database.So it is not advisable 2)Hotbackup can be taken while the DB upon running...

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RAM

• Jun 20th, 2012

- - - - -
| | | | |
| | | | +----- Day of week (0-6)
| | | +------- Month (1 - 12)
| | +--------- Day of month (1 - 31)
| +----------- Hour (0 - 23)
+------------- Min (0 - 59)

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How will you find-out if your database is using recovery catalog or not?

Ram

• Jun 20th, 2012

Querying views like rc_database in each catalog will identify the target database it is registered with.

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Dec 7th, 2011

There are few ways through which you would find if your database uses recovery catalog: Check backup scripts and findout if the scripts are making any connection to a recovery catalog. Check tnsnames...

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What is mean by fractured block in terms of manual hot backup?

ganesh

• Mar 12th, 2013

In case of hot backup we get fractured blocks, because of this reason hot backups is called Inconsistent backup. let say in hot backups our operating system copies OS block by OS block while copy is g...

alok83

 Profile Answers by alok83 Questions by alok83

• Apr 11th, 2008

The concept of fractured block occrus when backup is under process.It means you are taking backup and some other session is updating it.Then backup process can not get the consistent image of the block and it will be inconsistent right thats why it is called fractured block.

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What is a waterfall testing?

qaisar khan umraj

• Aug 12th, 2013

In waterfall we each step check 1st and last time means only one time we checking never take back checking never
we can repeat any previous steps

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NEERAJ KHANNA

• Oct 2nd, 2013

Checkpointing is nothing but give the signal / instruction to DBWN process to write the date from the database buffer cache to the datafile and after this ckpt process also update the SCN number in the header of data file and control file also.

FYIP

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Amol Patil

• Sep 14th, 2014

DBMS: Collection of data in one particular or single table.that is not related to other data object.

RDBMS: Relation between two or database table or the entity of number of database is relate to each other is known RDBMS.

sandeep

• Feb 12th, 2007

In DBMS tables are not related. In RDBMS tables are related In DBMS only one user can access the same database, at the same time. In RDBMS many users simultaneously access the same database RDBMS is m...

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Which process creates parsing?

himaVemula

• Nov 18th, 2014

Hard parse is the process that creates parsing

sharmme

 Profile Answers by sharmme Questions by sharmme

• Feb 17th, 2010

Server process dedicated to the user both in shared and dedicated server connection configuration.

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