关于日期判断的语句

Question

select * from t_submit where f_sendtime between to_date('2001-01-03','yyyy-mm-dd') and to_date('2001-03-03','yyyy-mm-dd');

Answer 1

f_sendtime between to_date('2003-01-01',yyyy-mm-dd')
and to_date('2003-01-03',yyyy-mm-dd')

Answer 2

between to_date('2003-01-01',yyyy-mm-dd')
and to_date('2003-01-03',yyyy-mm-dd')

Answer 3

f_sendtime between to_date('2003-01-01 00:00:00',yyyy-mm-dd hh24:mi:ss')
and to_date('2003-01-03 00:00:00',yyyy-mm-dd hh24:mi:ss')