What are the differences between a PL/SQL function and a stored procedure in Oracle?

Differences between a PL/SQL Function and a Stored Procedure in Oracle

When working with Oracle databases, it is essential to understand the differences between a PL/SQL function and a stored procedure. Both are commonly used for creating reusable code blocks, but they have distinct characteristics:

PL/SQL Function:

• 1. A PL/SQL function is used to perform a specific task and return a single value.
• 2. Functions must return a value to the calling environment.
• 3. Functions can be called in SQL statements.
• 4. Functions cannot have OUT or IN OUT parameters.
• 5. Functions can be nested within SQL statements.

Stored Procedure:

• 1. A stored procedure is used to perform one or more tasks without necessarily returning a value.
• 2. Procedures may or may not return values back to the calling environment.
• 3. Procedures cannot be directly called in SQL statements.
• 4. Procedures can have OUT or IN OUT parameters.
• 5. Procedures cannot be nested within SQL statements.

It is essential to choose between a PL/SQL function and a stored procedure based on the specific requirements of the task at hand. By understanding the differences outlined above, developers can effectively utilize these Oracle database objects in their applications.