SELECT Date, c1, c2
FROM Таблица
WHERE Date BETWEEN '01.01.2014' AND '05.01.2014'
ORDER BY Date

declare @t table (date char(10), c1 int, c2 int, c3 int);
insert into @t values
('01.01.2014',	1,	0,	1),
('02.01.2014',	1,	0,	0),
('03.01.2014',	0,	0,	0),
('04.01.2014',	0,	0,	1),
('05.01.2014',	1,	1,	1)

select min(date) as date, c1, c2
from @t
group by c1, c2
order by 1
---------------------
date	c1	c2
01.01.2014	1	0
03.01.2014	0	0
05.01.2014	1	1

declare @t table (date char(10), c1 int, c2 int, c3 int);
insert into @t values
('01.01.2014',	1,	0,	1),
('02.01.2014',	1,	0,	0),
('03.01.2014',	0,	0,	0),
('04.01.2014',	0,	0,	1),
('31.01.2014',	1,	1,	1)

select date
from @t
WHERE Date BETWEEN '01.01.2014' AND '05.02.2014'
------
01.01.2014
02.01.2014
03.01.2014
04.01.2014 

declare @t table (date datetime, c1 int, c2 int, c3 int);
insert into @t values
('20140101',	1,	0,	1);
insert into @t values
('20140102',	1,	0,	0);
insert into @t values
('20140103',	0,	0,	0);
insert into @t values
('20140104',	0,	0,	1);
insert into @t values
('20140105',	1,	1,	1);
insert into @t values
('20140106',	1,	0,	1);

select
 *
from
 @t t
where
 not exists(
  select
   *
  from
   (select top 1 * from @t where date < t.date order by date desc) x
  where
   x.c1 = t.c1 and x.c2 = t.c2
 );

WITH T AS
(
 SELECT * FROM
 (VALUES
  ('20140101',1,0,1)
 ,('20140102',1,0,0)
 ,('20140103',0,0,0)
 ,('20140104',0,0,1)
 ,('20140105',1,1,1)
 ,('20140106',1,0,1)
 )T(Date,c1,c2,c3)
)
SELECT T.*
FROM T
OUTER APPLY(SELECT TOP(1)* FROM T TT WHERE TT.Date<T.Date ORDER BY TT.Date DESC) TT
WHERE TT.Date IS NULL OR (TT.c1<>T.c1 OR TT.c2<>T.c2);