DATEADD() Function

The DATEADD() function adds a time/date interval to a date and then returns the date.


DATEADD(interval, number, date)


Select DATEADD(Year,1,'2017/08/01')

Select DATEADD(Year,1,'2017-08-01')

Select FirstName, BirthDate, DATEADD(Year,18,BirthDate) From Employees

Parameter	Description
interval	Required. The time/date interval to add. Can be one of the following values: year, yyyy, yy = Year quarter, qq, q = Quarter month, mm, m = month dayofyear = Day of the year day, dy, y = Day week, ww, wk = Week weekday, dw, w = Weekday hour, hh = hour minute, mi, n = Minute second, ss, s = Second millisecond, ms = Millisecond
number	Required. The number of interval to add to date. Can be positive (to get dates in the future) or negative (to get dates in the past)
date	Required. The date that will be modified