itranger :
I have the following situation:
I have the a timerange from 17h to 22h.
E.g. then I have a row with the following informations:
Starttime (datetime): 2020-03-16 13:15:00
Endtime (datetime): 2020-03-16 19:45:00
How can I get the number of hours which is between the fixed timerange (--> 2:45h)
GMB :
Assuming that start/end time do not span over days, you can use timediff(), greatest() and least():
select timediff(
greatest(time(start_time), '17:00:00'),
least(time(endtime), '22:00:00')
)
greatest(time(start_time), '17:00:00') gives you 17h if the (time component of) start_time is less than 17h.
least(time(endtime), '22:00:00' produces 22h if the end time is greater than 22h.
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