What is the usage of the max function in SQL?

In SQL, the MAX function is used to return the maximum value in a column or expression. It can be used for numerical, date, text columns, and more. The syntax for the MAX function is as follows:

SELECT MAX(column_name)
FROM table_name
WHERE conditions;

In this case, column_name refers to the name of the column for which the maximum value needs to be found, table_name is the name of the table to be queried, and conditions are optional filtering criteria.

For example, if we have a table named “orders” with customer order information, one of the columns is “order_amount” which represents the amount of the order. We can use the MAX function to find the highest order amount. Below is an example of the code:

SELECT MAX(order_amount)
FROM orders;

This will return the maximum value of the “order_amount” column in the “orders” table.