SQL Aggregation
SQL Aggregation is a core database concept that involves using aggregate functions to perform calculations on sets of rows in a database table, returning a single summary value. These functions operate on groups of data defined by the GROUP BY clause, allowing for operations like counting, summing, averaging, or finding minimum and maximum values. It is essential for data analysis, reporting, and deriving insights from relational databases.
Developers should learn SQL Aggregation when working with relational databases to generate meaningful summaries from large datasets, such as calculating total sales, average user ratings, or counting records by category. It is crucial for building data-driven applications, creating reports, and optimizing queries for performance in scenarios like business intelligence, analytics dashboards, and backend data processing.