How to get difference in two datetime in mysql

Question

Hai,

 

I need to get difference of two datetime, and that diff value is set in next column.

like 

 

 

 

Date	Duration
28-02-2017 17:46:00
28-02-2017 17:47:00	00:01:00
28-02-2017 17:49:00	00:02:00
28-02-2017 17:55:00	00:06:00
Total	00:09:00