Write a PL/SQL program to print reverse of a number. For example: 1234 print as 4321.

Create a trigger which will work before deletion in employee table and create a duplicate copy of the record in another table employee_backup.

Create a package which contains a procedure to accept a text and to check whether it is palindrome or not.

Create a package with procedure that shows the usage of the WHILE loop to calculate the average of user entered numbers and entry of more numbers are stopped by entering number 0?

Write a procedure to calculate factorial of a number entered by user.