This assignment will demonstrate the use of transactions. Specifically, changes will be rolled back to a previous state prior to performing a commit. The assignment will be composed of SQL Plus, DML, and DCL statements. Script that performs the following.

1. Login to SQL Plus as user SCOTT
2. Issue a statement to display the employee number, employee name and salaryfrom the "emp" table
3. Issue a statement to begin a transaction
4. Issue statement(s) to insert 4 new records into the "emp" table.
5. Issue a statement that repeats Step 2 (to verify that all changes have been added).
6. Issue a statement to rollback the changes
7. Issue a statement that repeats Step 2( to verify that all changes have been undone)

Save the script as Project13.sql