YEARS ("2002- 02- 19"; "2002- 02- 26"; 1) retorna 0, perquè no hi ha un any sencer entremig, començant al primer dia de l' any
YEARS("2002-02-19 ";" 2002-02-26 "; 1) returns 0, because there is not a whole year in between, starting at the first day of the year