insert into employee(id,name,dates) values(4,'wang',to_date('01-4月-2001','dd-Mon-yyyy'))
insert into employee(id,name,dates) values(5,'wang',to_date('01-04-2001','dd-mm-yyyy'))
insert into employee(id,name,dates) values(4,'wang',to_date('01-4月-2001','dd-Mon-yyyy'))
insert into employee(id,name,dates) values(5,'wang',to_date('01-04-2001','dd-mm-yyyy'))