Topic 9418 min readStructured Tutorial
SQL GROUP BY and HAVING: Grouping Multiple Columns
Quick Answer
In SQL, you can group data by multiple columns using the GROUP BY clause by listing all columns separated by commas. This groups rows that share the same values in all specified columns. The HAVING clause can then filter these grouped results based on aggregate conditions.
Learning Objectives
- Understand how to group query results by multiple columns using GROUP BY.
- Learn how to filter grouped data using the HAVING clause.
- Apply GROUP BY and HAVING together to solve real-world data aggregation problems.
Introduction
Grouping data is a fundamental operation in SQL used to summarize and analyze datasets.
The GROUP BY clause allows you to aggregate data based on one or more columns.
When grouping by multiple columns, SQL creates groups for each unique combination of those columns.
