_years_between
Returns a positive or negative integer number representing the number of years between "date_expression1" and "date_expression2". If "date_expression1" < "date_expression2" then a negative value is returned.
Syntax
_years_between ( date_expression1, date_expression2 )
Example
_years_between ( 2003-01-30 , 2001-04-03 )
Result
1