How to roll back in oracle

Rollback is a database operation used to undo changes to the database. In an Oracle database, rollback can be performed by connecting to the database and starting a transaction. Execute a ROLLBACK statement to roll back changes in a transaction. Commit the transaction to permanently save the rollback operation (optional). Additionally, Oracle provides other rollback options such as SAVEPOINT rollback, single row rollback, and table rollback.

Oracle Rollback

What is rollback?

Rollback is a database operation used to undo recent changes to the database. Rollback is critical when something goes wrong or data needs to be restored.

How to roll back an Oracle database?

Step 1: Connect to the database

Use SQL*Plus or other client tools to connect to the Oracle database you want to roll back.

<code class="sql">sqlplus username/password@database</code>

Step 2: Start a transaction

Before performing a rollback operation, a transaction must be started.

<code class="sql">START TRANSACTION;</code>

Step 3: Execute the rollback statement

To roll back all recent changes to the current transaction, use the ROLLBACK statement:

<code class="sql">ROLLBACK;</code>

Step 4: Commit the transaction (optional)

If you need to permanently save the rollback operation to the database, you need to commit the transaction:

<code class="sql">COMMIT;</code>

Rollback for specific scenarios

In addition to rolling back the entire transaction, Oracle also provides other types of rollback options:

• SAVEPOINT Rollback: Allows the user to rollback to a specific point in the transaction.
• Single row rollback: Rollback only specific database rows.
• Table rollback: Roll back changes to the entire table.

The specific rollback type used depends on the specific situation and the amount of data that needs to be rolled back.

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