How is the max function used in MySQL?
In MySQL, the MAX function is used to retrieve the maximum value of a specified column. It can be used for numeric columns, date columns, and text columns.
Syntax: MAX(column_name)
Explanation of parameters:
- Column name: the name of the column from which we want to retrieve the maximum value.
Assuming we have a table called orders, which has a column named quantity storing the quantity of different orders, we can use the MAX function to obtain the maximum value in the quantity column.
SELECT MAX(quantity) FROM orders;
This will return the maximum value in the quantity column.
Note: If the column containing the maximum value includes NULL values, the MAX function will ignore these NULL values and return the maximum value among the non-NULL values. If all values in the column are NULL, the MAX function will return NULL.
