If you need to return the day of the week on which a given date falls, some database systems enable this through functions that can be applied in the SELECT statement. Examples are the datepart() function in Microsoft and Sybase SQL Servers (which requests the ‘weekday’ part of the date), and Oracle’s to_char() function, which specifies a format of D (for day of week number 1 through 7) or DAY to get the name of the day.
If you database does not support this function, you can add a computed item to the Results section to derive it.