Question

I’m new in mysql and I’m currently having an issue with a query. I need to get an average duration for each activity each day within a week. The date format is like: ‘2000-01-01 01:01:01’, but I want to get rid of the 01:01:01 thing and only care about the date. How do I do that?

The table is something like this:

record_id   int(10)      NOT NULL,
activity_id varchar(100) NOT NULL,
start_time  datetime     NOT NUll,
end_time    datetime     NOT NULL,
duration    int(10)      NOT NULL;

Thanks.

Answer 1

You could do something like the following

select activity_id, dayofweek(datetime) as day, avg(duration) as average
from table_name  where datetime between start_date and end_date
group by activity_id,dayofweek(datetime)