SQL Date Function DAY()

The DAY() function is a SQL function used to extract the day of the month from a date or datetime value. It takes one argument, which is the date or datetime value from which the day of the month will be extracted.

Here's an example of how to use the DAY() function in a SQL query:

SELECT DAY('2022-02-28');

This query will return the integer value 28, which is the day of the month in the date "2022-02-28".

Note that the DAY() function is specific to the database management system you are using, and the syntax and date format it supports may vary slightly depending on the system. Additionally, the DAY() function only extracts the day of the month from a date or datetime value, and does not take into account other components such as the year or month.