A Function (SQL) is a predefined set of instructions in SQL (Structured Query Language) that serves to perform specific calculations or operations on data in a database. SQL functions enable the execution of various tasks, such as data aggregation (e.g., SUM, AVG), text manipulation (e.g., CONCATENATE), date operations (e.g., DATEFORMAT), and many others. Functions are an essential tool in databases, enabling programmers and analysts to work with data, transform and analyze it, which significantly facilitates data management in applications and database systems.
Słownik