oracle sql and dba tutorial logo

Tutorial for Oracle SQL

Oracle DBA Interview Questions

Most asked Oracle DBA Interview Questions.

60 Technical Questions
42 Backup & Recovery Questions

Unix For Oracle DBA 20 Questions

Oracle DBA Topics

Overview of Oracle Grid Architecture

Difference between cluster and grid

Responsibilities of DBA's

Creating Oracle Database

Creating Database using SQL

Creating DB in 12c using DBCA

Creating DB in 12c using SQL commands

Managing Oracle 12c Container Databases

Creating Users in Oracle 12c

Managing Pluggable Databases in Oracle 12c

Creating Pluggable Database

Cloning Pluggable Database

Unplug and Plug databases in CDB's

Managing Tablespaces and Datafiles

Extending tablespaces

Decreasing size of a tablespace

Coalescing Tablespaces

Taking tablespaces Offline or Online

Making a Tablespace Read only

Renaming Tablespaces

Dropping Tablespaces

Viewing Info about Tablespaces

Renaming Datafiles

Relocating Datafiles

Relocating Datafiles in Multiple Tablespaces

Temporary Tablespace

Changing the size

Tablespace Groups

Creating a Temp. Tablespace Group

Assigning a Tablespace Group

Diagnosing and Repairing LMT

Scenario 1: Fixing Bitmap

Scenario 2: Dropping a Corrupted Segment

Scenario 3: Fixing Bitmap when Overlapped

Scenario 4: Correcting Corruption of Blocks

Scenario 5: Migrating from a Dictionary-Managed to LMT

Transporting Tablespaces

Procedure for transporting tablespaces

Transporting Tablespace Example


Adding New Redo Logfile Group

Adding Members to group

Dropping Members from group

Dropping Logfile Group

Resizing Logfiles

Renaming or Relocating Logfiles


Viewing Info About Logfiles

Managing Control Files

Multiplexing Control File

Changing the Name of a Database

Creating A New Control File

Cloning an Oracle Database


Switching to Automatic Management

Calculate Undo Retention

Altering UNDO Tablespace

Dropping an Undo Tablespace

Switching Undo Tablespaces

Viewing Information

SQL Loader


From Fixed Length file

From MySQL to Oracle

Using WHEN condition

Conventional and Direct Path Load

Direct Path

Restrictions on Using Direct Path Loads

Export and Import

Invoking Export and Import

Parameters of Export tool

Exporting Full Database

Exporting Schemas

Exporting Tables

Exporting Consistent Image of tables

Using Import Utility

Example Importing Tables

Import from One User to another User

Using Pattern Matching

Migrating a Database across platforms


Data Pump Export

Exporting a Full Database

Exporting a Schema

Exporting Individual Tables

Filtering Objects during Export

Filter Rows during Export

Suspending and Resuming Export

Data Pump Import Utility

Importing Full Dump File

Importing Objects between Schemas

Loading Objects between Tablespaces

Generating SQL File of DDL commands

Import objects of a Schema

Importing Only Particular Tables

Interactive Mode

Flash Back Features

Flashback Query

Flashback Version Query

Flashback Table to Past States

Purging Objects from Recycle Bin

Flashback Objects With Same Name

Flashback instead of PIT Recovery

Enabling Flash Back Database

Sizing flash recovery area

How far we can flashback database

Example:Flashing Back Database

Flashback Data Archive (FDA)
(Oracle Total Recall)


Creating FDA tablespace

Creating FDA

Querying historical data

Log Miner

LogMiner Configuration

LogMiner Dictionary Options

Using the Online Catalog

Extracting Dictionary to Log Files

Extracting Dictionary to File

Redo Log File Options

Example: Finding All Modifications

Mining Logfiles in a Time Range


Opening DB in Archivelog Mode

Reverting back to NoArchiveLog mode

Taking Offline (COLD) Backups

Taking Online (HOT) Backups

Recovering from the Loss of a Datafile

When in Noarchivelog Mode

When in Archivelog Mode

Recovering from loss of Control File

Recovery Manager ( RMAN )

Offline Backups using RMAN

Recover DB when in NOARCHIVELOG

Online Backups using RMAN

Backup tablespaces or datafiles

Image Backups in RMAN

Incremental Backup using RMAN

Updating backup copy for fast recovery

View info about RMAN backups

Configuring Retention policy

Configure Options in RMAN

Maintaining RMAN Repository

Recover datafiles (Archivelog mode)

Recover datafiles by renaming

Performing Disaster Recovery










 Using Oracle Flashback Data Archive (Total Recall)

Flashback Data Archive ( Oracle Total Recall ) introduced in 11g

Flashback Data Archive feature  is part of Oracle Total Recall technology. Flashback Data Archive feature lets you to track changes made in any number of tables for any given retention time. The retention time can be some days or months or years.

Flashback data archives retain historical data for the time duration specified using the RETENTION parameter. Historical data can be queried using the Flashback Query AS OF clause. Archived historic data that has aged beyond the specified retention period is automatically purged.

This feature is supported only Oracle 11g Enterprise Edition. It is not available in Standard or Express editions.

Lets see an example.

Step 1:-  Create Flashback data archive tablespace.

SQL> create tablespace FB_Storage datafile '/u01/oracle/oradata/orcl/fdstore.dbf'
              size 100m autoextend on segment space management auto;

Step 2:- Create Flashback Archive

SQL> create flashback archive default FB_Arch1 tablespace FB_Storage quota 1g retention 1 year

Flashback archive created

Step 3:- Turn on Flashback archive for tables you want to track.

For Example to enable flashback archive for table Scott.emp

(i) Grant Flashback archive privilege

SQL> grant flashback archive on fb_arch1 to scott;

Grant succeeded.

SQL> connect scott/tiger

(ii) Enable flashback archive for table

SQL> alter table emp flashback archive

Flashback Data Archive (FBDA) Example.

Suppose a user has deleted rows from emp by giving a delete statement like this

SQL> set time on;

21:48:40 SQL> delete from emp where deptno=10;

3 rows deleted.

21:51:38 SQL> commit;

Commit complete.

To View the state of table emp 10 minutes before

21:57:08 SQL> select * from emp as of timestamp sysdate - 10 / (24*60);

Versions Query (11gR2 only) (To see what changes are made to Emp No. 7902 between last 15 minutes

22:18:34 SQL> select * from emp versions between
                timestamp sysdate- 15 /(24*60) and sysdate 
                                    where empno=7902;



HomeContact Us

Data Loader

Data Loader is a simple yet powerful tool to
export and import Data between many common database formats

Forms Data Loader

Tool to load data into Oracle E-Business Suite R12 / Oracle Apps using Macros and Forms Record and Playback

Interface Computers Academy © 2007-2017 All Rights Reserved