Day Calculation in SQL

Question

ADMID	WardID	FromDate	ToDate
1280	6	2018-04-16 13:54:29	2018-04-19 07:19:48
1280	5	2018-04-19 07:19:48	2018-04-19 23:20:45
1280	6	2018-04-19 23:20:45	2018-04-21 23:20:45

I need below sql output for the table above :

 

Sno	ADMID	WardID	FromDate	ToDate	Duration	Day
1	1280	6	2018-04-16 13:54:00	2018-04-17 13:54:00	1 days, 0 hours, 0 minutes and 0 seconds	1
2	1280	6	2018-04-17 13:54:00	2018-04-18 13:54:00	1 days, 0 hours, 0 minutes and 0 seconds	2
3	1280	6	2018-04-18 13:54:00	2018-04-19 07:19:00	0 days, 17 hours, 25 minutes and 0 seconds	3
4	1280	5	2018-04-19 07:19:00	2018-04-19 13:54:00	0 days, 6 hours, 35 minutes and 0 seconds	3
5	1280	5	2018-04-19 13:54:00	2018-04-19 23:20:00	0 days, 9 hours, 26 minutes and 0 seconds	4
6	1280	6	2018-04-19 23:20:00	2018-04-20 13:54:00	0 days, 14 hours, 34 minutes and 0 seconds	4
7	1280	6	2018-04-20 13:54:00	2018-04-21 13:54:00	1 days, 0 hours, 0 minutes and 0 seconds	5
8	1280	6	2018-04-21 13:54:00	2018-04-21 23:20:00	0 days, 9 hours, 26 minutes and 0 seconds	6

 

Please suggest me on this, i tried a lot but cann't get a proper query.