How to extend the query to add 0 in the cell when no activity is performed

Question

I have the following query, it is working fine to show the cricket time played per day. All I need is to show 0 when no cricket is played. At the moment it is skipping those

Answer 1

Try this. You can generate the missing dates in a union by using the existing CTE as a basis for Row_Number()

;WITH CTE AS (
SELECT email, last_update, activity, starttime, endtime, duration as [Totaltime] from users 
WHERE activity='cricket' and email='abc'
GROUP BY email, activity, duration, starttime, endtime, last_update
)
Select activity, cast(starttime as date) as date,
SUM(datediff(second, starttime, endtime))/60.0 as TimePerDay
from cte
where starttime >= dateadd(day, -15, last_update)
group by activity, cast(starttime as date)
UNION ALL
Select 'cricket' activity, everyday.[date], 0
FROM 
(
    select top 1000 dateadd(day,row_number() OVER (order by starttime),(select cast(min(starttime) as date) from CTE)) [date]
    from CTE
) everyday
WHERE everyday.[date] NOT IN (SELECT cast(starttime as date) FROM CTE)
AND everyday.[date] < (SELECT cast(max(starttime) as date) from CTE)
ORDER BY date