TSQL Query returns values for each hour for the past 24 hours

Question

I have a query that I don\'t really know how to begin with. I\'m hoping someone can help me out with it. I will start by explaining the table

I have a device table with

Answer 1

Something like this might get you started.

select  SUM(datediff(second, Begin_dt, End_dt)) as seconds_online
        ,DATEPART(hour, Begin_dt) as [hour]
from table
where device_status in (1,4,5)
group by DATEPART(hour, Begin_dt)

To format the result you may want to follow this question:

SQL - Seconds to Day, Hour, Minute, Second