Если вы используете SQL сервер, вы можете убедиться, что Cast и группировать по.
with cte as (
select '15017' as NIP, '2020-03-24 08:00:02.550' as TimeStamps union all
select '15017' as NIP, '2020-03-24 08:01:00.117' as TimeStamps union all
select '15017' as NIP, '2020-03-24 08:05:30.440' as TimeStamps union all
select '15017' as NIP, '2020-03-24 08:05:37.397' as TimeStamps union all
select '15017' as NIP, '2020-03-24 08:06:25.160' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 08:08:01.537' as TimeStamps union all
select '15017' as NIP, '2020-03-24 10:41:15.500' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 11:40:37.327' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 11:41:43.750' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 13:25:01.000' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 14:11:26.000' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 14:11:39.000' as TimeStamps union all
select 'H8137' as NIP, '2020-03-24 14:22:50.000' as TimeStamps union all
select '15017' as NIP, '2020-03-24 18:26:10.000' as TimeStamps union all
select '15017' as NIP, '2020-03-24 18:26:16.000' as TimeStamps union all
select '15017' as NIP, '2020-03-24 18:26:46.000' as TimeStamps union all
select '15017' as NIP, '2020-03-24 18:26:51.000' as TimeStamps union all
select '15017' as NIP, '2020-03-24 18:27:06.000' as TimeStamps union all
select '15017' as NIP, '2020-03-24 18:27:12.000' as TimeStamps )
select cast(TimeStamps as date) Date , NIP, min(cast (TimeStamps as time)) Clock_in, max(cast (TimeStamps as time)) Clock_out from cte
group by cast(TimeStamps as date) , NIP;
выход: