Converting Complicated SQL query to EntityFramework - sql

Question

I'm trying to translate a SQL stored procedure into an EF Core query, but it's proving beyond me.
The SP I'm translating looks like this:
select sale.[CustName] as [Customer Name],
cust.City,
Max(sale.Price) as [MaxPrice],
Avg(sale.Price) as [Average],
sum(case when sale.Price > 0 then 1 else 0 end) as [NumDays]
from SalesRecords as sale
inner join Customers as cust on sale.Acct = cust.AcctNbr
where sale.[Date] between /*Start Date Param*/ and /*End Date Param*/
group by cust.[CustName], cust.City
After some heavy Googling, I've come up with the following EF Query so far:
SalesDataModel salesData =
(from s in Sales
where s.Date >= start && s.Date <= end
join c in Customers on s.Acct equals c.AcctNbr
group s by new { s.Name, c.City } into cg
select new SalesDataModel {
CustName = cg.GetType().Name,
City = cg.GetType().City
MaxBorrowed = (from sa in Sales
select sa.Price).Max(),
Average = (from sa in Sales
select sa.Price).Average(),
NumDays = (from sa in Sales
where sa.Price > 0
select sa.Price).Count()
}).ToListAsync();
...so I think I'm on the right track. So far, I have two questions:
After I group my two datasets into cg, how do I select values from the group to populate SalesDataModel? cg.GetType() doesn't seem to be the way, since the "City" item in my "cust" model isn't found there.
Am I doing my subqueries right? They should be selecting by account number, not from the whole dataset. If I'm not correct, where am I going wrong?

Answer 1

It is simple GroupBy query:
var query =
from s in Sales
where s.Date >= start && s.Date <= end
join c in Customers on s.Acct equals c.AcctNbr
group s by new { s.Name, c.City } into g
select new SalesDataModel
{
CustName = g.Key.Name,
City = g.Key.City,
MaxBorrowed = g.Max(x => x.Price),
Average = g.Average(x => x.Price),
NumDays = g.Sum(x = > .Price > 0 ? 1 : 0)
};