Date Operators You can include the following operators in date expressions: Operator Meaning + Add a number of days to a date to produce a new date. – The number of days between two dates, or subtract a number of days from a date to produce a new date. The following table shows examples of date expressions. In these examples, hire_date is {01/30/1990}. Example Resulting Value hire_date + 5 {02/04/1990} hire_date – {01/01/1990} 29 hire_date – 10 {01/20/1990}