What is the difference between a stored procedure and a function in PL/SQL, and when would you choose to use one over the other in a database application?

1 Answers
Answered by suresh

Stored Procedure vs Function in PL/SQL

Stored Procedure vs Function in PL/SQL

In PL/SQL, stored procedures and functions are both named PL/SQL code blocks that perform a specific task. However, there are key differences between the two:

Stored Procedure:

  • Can perform multiple operations and tasks.
  • Can have input and output parameters.
  • Cannot be used in SQL statements directly.
  • Does not have a return statement.
  • Is typically used for procedural tasks and data manipulation.

Function:

  • Performs a single task and returns a value.
  • Must have a return statement.
  • Can be used in SQL statements directly.
  • Can be part of an SQL query and return a value.
  • Is typically used for calculations and data retrieval.

When to Choose:

The choice between a stored procedure and a function in a database application depends on the specific requirements of the task:

  • Use a stored procedure when you need to perform multiple operations and tasks. For example, updating multiple tables, sending emails, and logging information.
  • Use a function when you need to perform a calculation or data retrieval task that returns a value. For example, calculating a total, retrieving specific data based on input parameters.

Overall, understanding the differences between stored procedures and functions in PL/SQL is essential for designing efficient and effective database applications.

Answer for Question: What is the difference between a stored procedure and a function in PL/SQL, and when would you choose to use one over the other in a database application?