GROUP BY

GROUP BY is an SQL clause used in SELECT statements to arrange identical data into groups. It's typically used with aggregate functions (like COUNT, SUM, AVG) to perform calculations on each group of rows. GROUP BY collects data across multiple records and groups the results by one or more columns, allowing for analysis of data at a higher level of granularity. This clause is fundamental for generating summary reports, performing data analysis, and creating meaningful aggregations of data in relational databases.

Visit the following resources to learn more:

• @article@SQL GROUP BY
• @video@Advanced Aggregate Functions in SQL