如何在實體框架中使用兩次表？

Question

如何在實體框架中編寫此查詢？

SELECT * FROM [Account] 
where [Account].[AccountID] not in (select [Account].[ParentID] from [Account]) 

Answer 1

一種方式來做到這一點是這樣的：

from a in db.Account 
where !db.Account.Any(a2 => a2.ParentID == a.AccountID) 
select a;