Procedures and Functions in PostgreSQL

In PostgreSQL, functions and procedures encapsulate reusable logic within the database to enhance performance and maintain organization. Functions return a value or a table, take input parameters, and are used in SQL queries, defined with CREATE FUNCTION. Procedures, introduced in PostgreSQL 11, do not return values but can perform actions and include transaction control commands like COMMIT and ROLLBACK, defined with CREATE PROCEDURE and called using the CALL statement. Key differences include functions' mandatory return value and integration in SQL queries, while procedures focus on performing operations and managing transactions.