SQLite Aggregate Functions - MAX

SQLite provides several aggregate functions that are used to perform calculations on a set of values and return a single value as the result. One such function is MAX, which is used to find the highest value in a set of values.

Syntax

The syntax for the MAX function is as follows:

SELECT MAX(column_name) FROM table_name;

Where column_name is the name of the column from which you want to find the maximum value, and table_name is the name of the table that includes the column.

Example

Suppose we have a table called employees with columns for employee_id, employee_name, and salary. We can use the MAX function to find the highest salary value among all employees:

SELECT MAX(salary) FROM employees;

Output

The output of the above SQL query would be the highest salary value among all employees:

MAX(salary)
------------
  80000

Explanation

The SQL query finds the maximum value in the salary column of the employees table and returns it as the output.

Use

The MAX function is useful when you want to find the highest or maximum value in a set of values. It can be used with any numeric or date/time data type.

Important Points

• The MAX function returns NULL if the specified column contains no rows.
• The MAX function can only be used with numeric or date/time data types.
• If there are multiple rows with the same maximum value, the function returns only one row.

Summary

In this tutorial, we learned about the MAX function in SQLite, which is used to find the highest value in a set of values. We saw examples of how to use the MAX function with a table of employee data to find the highest salary value. The MAX function is useful when you need to find the highest or maximum value in a set of values, and can be used with any numeric or date/time data type.