# Grouping

Grouping is a powerful technique in SQL that allows you to organize and aggregate data based on common values in one or more columns. The `GROUP BY` clause is used to create groups, and the `HAVING` clause is used to filter the group based on certain conditions.

Learn more from the following resources:

- [@official@PostgreSQL GROUP BY CLAUSE](https://www.postgresql.org/docs/current/sql-select.html#SQL-GROUPBY)
- [@article@PostgreSQL GROUP BY](https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-group-by/)
- [@article@PostgreSQL - GROUP BY](https://www.tutorialspoint.com/postgresql/postgresql_group_by.htm)
- [@article@PostgreSQL - HAVING](https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-having/)
- [@video@PostgreSQL Group BY](https://www.youtube.com/watch?v=SI-bPx4jaGc)