Calculating average with pivot - sql

Question

I am trying to find the average with the help of pivot but not able to find the right solution.
The below is my query:
select branch, ISNULL([11:00], 0) as [11:00],ISNULL([11:15], 0) as
[11:15],ISNULL([11:30], 0) as [11:30], ISNULL([11:45], 0) as [11:45],
ISNULL([12:00], 0) as [12:00]
from
(
select b.branchname
,convert(varchar(5), intervals.interval_start_time, 108)
,sum(b.ordercount) ordercounts
from branch b cross apply dbo.getDate15MinInterval(CAST(b.TransactionDate
as date)) as intervals
where b.TransactionDate >= interval_start_time and b.TransactionDate <=
interval_end_time
and CAST(TransactionDate AS date) IN ('2017-07-01','2017-07-08')
group by DATEPART(WEEKDAY,TransactionDate),b.branchname,intervals.interval_start_time,intervals.interval_end_time
) t
pivot ( avg(ordercounts) for interval_start_time in ( [11:00], [11:15] ,
[11:30], [11:45], [12:00])) as p
My original table is:
Result from the above query is:
Expected result:
For 15minuteinterval query, please refer my original post:
Group data by interval of 15 minutes and use cross tab

Answer 1

SQL Server does integer arithmetic operations on integers. The problem is that this is an integer:
sum(b.ordercount) as ordercounts
(presumably).
So, just turn it into a floating/fixed point number. I usually just multiply by 1.0:
sum(b.ordercount)*1.0 as ordercounts
But you can be more specific about your types if you like.

Answer 2

Try casting to float -
AVG(CAST(ordercounts AS FLOAT))
SUM(CAST(b.ordercount AS FLOAT)) AS ordercounts

Answer 3

Can be done like this:
select branchname, [dayname], ISNULL([11:00], 0) as [11:00], AVG(CAST([11:00] as float)) over() [Avg_11:00]
from
(
select branchname, [dayname], ISNULL([11:00], 0) as [11:00], ISNULL([11:15], 0) as [13:15], ISNULL([11:30], 0) as [11:30], ISNULL([11:45], 0) as [11:45]
from
(
select intervals.[dayname]
, b.branchname
, convert(varchar(5), intervals.interval_start_time, 108) interval_start_time -- for hh:mm format
, sum(b.ordercount) ordercount
from branch b cross apply dbo.getDate15MinIntervals(CAST(b.TransactionDate as date)) as intervals
where b.transactiondate between interval_start_time and interval_end_time
group by intervals.[dayname], b.branchname, intervals.interval_start_time, intervals.interval_end_time
) t
pivot ( sum(ordercount) for interval_start_time in ( [11:00], [11:15] , [11:30], [11:45] )) as p
) t
group by branchname, [dayname], [11:00]
AVG OVER() is valid as of SQL Server 2008.
In this example I only used one interval, but you can extend it to all of the ones you need.
I tried with some sample data from yesterday's answer and it returns values as below:
Happy coding! :)