Converts a string to a DateTime object.
DateTime? DATEVALUE(string value)
or
DateTime? DATEVALUE(string value, string format)
DATEVALUE("25-JAN-2017")
Returns a DateTime of "25/01/2017 00:00"
or
DATEVALUE("20170125", "yyyyMMdd")
Returns a DateTime of "25/01/2017 00:00"
or
Used within other expressions:
DATEDIFF("month", DATEVALUE("2016-05-02"), DATEVALUE("2017-02-25"))
Will return '9' as there are nine months between the two dates.
or
DATESTR(DATEVALUE("2017-10-09"), "dd/MM/YYYY")
Will return '09/10/2017'.