LINQ count with group by from SharePoint list items.

Hi,

I need some aggregate data from SharePoint lists which has a common column as primary and foreign key (lookup column)I have two lists called Entity and Sector. Each entity reports to a Sector and few entities do not report to any one.

Entities have Risk column which can have one of Risk level. Either High, Medium or Low. I want a result set which will tell me entities count by Risk per Sector.

I am able to get correct total entities count from my first query but unable to group them and get the count by risk as SQL query doing in snapshot below.

I successfully got the result from SQL and this is what is expected from LINQ. Either query or tools to generate LINQ would be helpful.

LINQ query

var result = (from SPListItem e in lstEntity.Items
                                      join SPListItem s in lstSRA.Items on new SPFieldLookupValue(Convert.ToString(e["Reporting_x0020_SRA_x003a_ID"])).LookupId equals s.ID
                                      where
                                          Convert.ToBoolean(e["IsActive"]) == true&& Convert.ToDateTime(e["CenterApprovalDate"]) <= startDate
                                      select new
                                      {
                                          SRAId = s.ID,
                                          Sector = new SPFieldLookupValue(Convert.ToString(s["Sector:Title"])).LookupValue,
                                          LicensedEntities = s["LicensedEntities"] != null ? Convert.ToInt32(s["LicensedEntities"]) : 0,
                                          Risk = new SPFieldLookupValue(Convert.ToString(e["Risk:Title"])).LookupValue
                                      }
                                     ).ToList();

select sec.[Sector:Title] as 'Sector',count (enty.id) 'Total Entities', 
sum(case when enty.[Risk:Title] = 'High' then 1  else 0 end) as 'High Risk' ,
sum(case when enty.[Risk:Title] = 'Medium' then 1  else 0 end) as 'Medium Risk',
sum(case when enty.[Risk:Title] = 'Low' then 1  else 0 end) as 'Low Risk'
from Entity enty left join SRA sec on enty.[Reporting SRA:ID] = sec.ID
where enty.IsActive=1 
group by sec.[Sector:Title] order by sec.[Sector:Title]