Returns the date produced by adding a number of the date parts to a date.
DATEADD( date-part, numeric-expression, date-expression )
year | quarter | month | week | day | dayofyear | hour | minute | second | millisecond
date-part The date part to be added to the date. For more information about date parts, see Date parts.
numeric-expression The number of date parts to be added to the date. The numeric_expression can be any numeric type, but the value is truncated to an integer.
date-expression The date to be modified.
SQL/2003 Vendor extension.
The following statement returns the value: 1995-11-02 00:00:00.000.
SELECT DATEADD( month, 102, '1987/05/02' );