PL/SQL Functions vs Procedures: Understanding the Key Differences

One commonly asked interview question in the PL/SQL Developer category is about the difference between PL/SQL functions and procedures. Let's explore the key distinctions:

PL/SQL Function:

• A PL/SQL function is a named PL/SQL block that returns a value.
• Functions are used to compute and return a single value.
• Functions must return a value to the calling environment.
• Functions can be called within SQL statements.

PL/SQL Procedure:

• A PL/SQL procedure is a named PL/SQL block that performs an action.
• Procedures are used to perform operations without returning a value.
• Procedures may or may not return values to the calling environment.
• Procedures cannot be called within SQL statements.

Key Differences:

Functions return a single value, while procedures do not return any value. Functions can be called within SQL statements, whereas procedures cannot. Understanding these differences is essential for effective PL/SQL programming.

When faced with the question about the difference between PL/SQL functions and procedures in an interview, remember these key distinctions to showcase your understanding of PL/SQL development.