create table t1
(
	id int not null,
	date1 datetime not null,
	date2 datetime not null
)

create table t2
(
	id int not null,
	date1 datetime not null,
	date2 datetime not null
)
GO

insert into t1 values( 1 , '01.01.2002', '05.01.2002')
insert into t1 values( 1 , '02.02.2002', '05.02.2002')
insert into t1 values( 1 , '03.03.2002', '06.03.2002')

insert into t2 values( 1 , '01.01.2002', '05.01.2002')
insert into t2 values( 1 , '02.02.2002', '06.02.2002') 
GO

Select
	isnull(t1.id,t2.id),
	t1.date1 as [t1.date1],
	t1.date2 as [t1.date2],
	t2.date1 as [t2.date1],
	t2.date2 as [t2.date2]
From
	t1
	full outer join t2
		on t1.id=t2.id and t1.date1=t2.date1 and t1.date2=t2.date2
Where
	t1.id Is NULL or t2.id Is NULL

drop table t1
drop table t2

Select DISTINCT id From t1
Select DISTINCT id from t2