How would you handle exceptions in PL/SQL programming and what are the different types of exceptions that can occur?

Handling Exceptions in PL/SQL Programming

In PL/SQL programming, exceptions are used to handle errors and unexpected situations that may occur during the execution of a program. There are different types of exceptions that can occur in PL/SQL, some of which include:

• Predefined Exceptions: These are exceptions that are predefined by Oracle and are raised automatically when certain errors occur, such as NO_DATA_FOUND or TOO_MANY_ROWS.
• User-Defined Exceptions: These are exceptions that are defined by the user and can be raised explicitly using the RAISE statement.
• Unhandled Exceptions: These are exceptions that are not caught and handled in the program, which can result in the termination of the program.

To handle exceptions in PL/SQL programming, you can use the BEGIN ... EXCEPTION ... END block to catch and handle specific exceptions. You can also use the WHEN OTHERS exception handler to catch all other exceptions that are not explicitly handled.

By handling exceptions effectively in your PL/SQL programs, you can ensure robust error handling and improve the overall reliability and performance of your applications.