如何在linq或lambda表達式中使用having，group by和distinct

Question

我需要將以下查詢轉換為linq或lambda表達式

 SELECT count(Hid.HouseholdID) FROM
 (SELECT HouseholdID FROM tblTmpJoinAll 
 WHERE loyal = 1 Group By HouseholdId 
 HAVING Count(distinct BasketID)>1) as Hid;

我到目前為止已經嘗試過

lst.Where(f => f.Flybuys == true)
.GroupBy(h=>h.HouseholdID)
//.Where(x=>x.)// don't know what to right here
.Select(h => h.Key).Count();

Answer 1

我認為這段代碼有效。

lst.Where(f => f.Flybuys) // you don't need == true here
   .GroupBy(f => f.HouseholdID)
   .Where(f => f.GroupBy(i => i.BasketID).Count() > 1)
   .Count();