ClickHouse/docs/en/sql-reference/aggregate-functions/reference/max.md

slug	sidebar_position	title
/en/sql-reference/aggregate-functions/reference/max	3	max

Aggregate function that calculates the maximum across a group of values.

Example:

SELECT max(salary) FROM employees;

SELECT department, max(salary) FROM employees GROUP BY department;

If you need non-aggregate function to choose a maximum of two values, see greatest:

SELECT greatest(a, b) FROM table;