SQL Functions

SQL functions are predefined operations within a database that perform specific tasks on data, such as calculating sums, averages, counting entries, or transforming data formats. They help simplify complex queries by automating common data manipulations. For example, a SUM function adds up all numbers in a column, while a COUNT function tells you how many entries exist. These functions make data analysis more efficient and enable users to retrieve meaningful insights without manually processing each piece of data. Essentially, SQL functions are powerful tools that streamline data management and analysis within a database environment.