Скачать или смотреть How to Take a Complete Backup of Oracle Database – Step by Step

Hello and welcome to today’s video!
In this session, we’re going to talk about a very important topic – Database Backups.
If you are managing a software system or working with databases, especially Oracle Database, then taking regular backups is your responsibility.
But why are backups so important?
Imagine if your system crashes, someone accidentally deletes critical data, or a cyberattack corrupts your database — in such cases, a backup is the only way to recover your valuable information.
So in today’s video, I’ll show you how to take a complete backup of your Oracle Database using the Data Pump Export tool — step by step — along with the exact commands you need to use."
HOW TO TAKE A COMPLETE BACKUP OF ORACLE DATABASE
"There are two common methods to take backups in Oracle Database:
Data Pump Export/Import (expdp / impdp)
RMAN (Recovery Manager)
In this video, we’ll focus on Data Pump Export (expdp) because it’s user-friendly and widely used for logical backups."
🧰 STEP-BY-STEP: Using expdp (Data Pump Export)
Step 1: Create a Directory Object in Oracle
CREATE OR REPLACE DIRECTORY backup_dir AS 'D:\Oracle_Backups';
GRANT READ, WRITE ON DIRECTORY backup_dir TO system;

"First, you need to tell Oracle where to store the backup file.
This command creates a directory object pointing to a folder on your computer or server.
Make sure the physical folder 'D:\Oracle_Backups' exists and is accessible."

Run the Export Command

expdp system/password@ORCL FULL=Y DIRECTORY=backup_dir DUMPFILE=full_backup_%U.dmp LOGFILE=full_backup.log FILESIZE=1G

"This is the main command to take a full backup of your database.

Here's what each part means:

system/password@ORCL — your Oracle username, password, and database name.

FULL=Y — means you want to export the entire database.

DIRECTORY=backup_dir — this is the directory object you just created.

DUMPFILE=full_backup_%U.dmp — name of the backup file; %U allows multiple dump files if needed.

LOGFILE=full_backup.log — Oracle writes all process messages and errors to this log file.

FILESIZE=1G — sets the maximum size for each dump file. Oracle will create multiple files if needed."

Verify the Backup Files
"Once the export is complete, go to the physical backup folder — in our case, D:\Oracle_Backups — and you’ll see .dmp files and a .log file.

Open the log file to make sure the backup completed successfully without errors."

WHY REGULAR BACKUPS ARE IMPORTANT]
"Let’s quickly talk about why regular backups are critical:

System or hardware failure

Human errors like accidental deletions

Cyberattacks or malware

Application bugs or crashes

In all these situations, your latest backup is your only safety net.

So always schedule backups — daily, weekly, or before any major update or migration."

"I hope this video helped you understand how to take a full Oracle database backup using Data Pump Export.

In future videos, I’ll also cover how to restore this backup, and how to use RMAN for physical backups.

If you found this helpful, don’t forget to like, subscribe, and comment below.

Thanks for watching — see you in the next video!"


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