How to delete all data from oracle

Deleting all data in Oracle requires the following steps: 1. Establish a connection; 2. Disable foreign key constraints; 3. Delete table data; 4. Submit transactions; 5. Enable foreign key constraints (optional). Be sure to back up the database before execution to prevent data loss.

How to delete all data in Oracle

Deleting all data in an Oracle database can be done by following the following steps:

Step 1: Establish a connection

• Connect to the target database.

Step 2: Disable foreign key constraints

• If there are foreign key constraints in the database, you need to disable them to allow all data to be deleted.

   <code class="sql">ALTER TABLE table_name DISABLE CONSTRAINT constraint_name;</code>

Step 3: Delete the table data

• Use the DELETE statement to delete all data in the table.

   <code class="sql">DELETE FROM table_name;</code>

Step 4: Submit transaction

• Submit transactions to permanently delete data.

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

Step 5: Enable Foreign Key Constraints (optional)

• If foreign key constraints are disabled in step 2, they need to be re-enabled.

   <code class="sql">ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;</code>

Notice:

• Before performing the above steps, be sure to back up the database to prevent data loss.
• If you delete a table involving a large amount of data, the process can take quite a while.
• Make sure that only users with the appropriate permissions can do this.

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