I use the sql below in sqlite to group by time intervals. The first is group by day and the second group by hour:
select strftime('%Y-%m-%dT%00:00:00.000', date_time),line, count() from entry group by strftime('%Y-%m-%dT%00:00:00.000', date_time)
select strftime('%Y-%m-%dT%H:00:00.000', date_time),line, count() from entry group by strftime('%Y-%m-%dT%H:00:00.000', date_time)
How do I开发者_运维知识库 group by 10 minutes interval
select ... from entry
group by strftime('%Y%m%d%H0', date_time) + strftime('%M', date_time)/10;
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