Understanding the Difference Between a Function and a Procedure in PL/SQL

In PL/SQL, the key difference between a function and a procedure lies in their return types and usage.

Function:

• Definition: A function in PL/SQL is a named block that returns a value. It must return a single value of a specified datatype.
• Usage: Functions are used to perform calculations or tasks that return a single value. They can be called in SQL statements or expressions.

Procedure:

• Definition: A procedure in PL/SQL is a named block that performs a set of actions. It does not return a value explicitly.
• Usage: Procedures are used to execute a sequence of statements or actions. They are commonly used for tasks that do not require a return value, such as data manipulation or system maintenance.

Therefore, the primary difference between a function and a procedure in PL/SQL is that a function returns a value, whereas a procedure does not. Understanding this distinction is essential for effectively utilizing these constructs in your PL/SQL programs.