LINQ HAVING子句內選擇

Question

如何將以下轉化爲LINQ - EF

select Name 
from TableA as TableAOuter 
group by TableAOuter.Name, TableAOuter.Id 
having(
    select count(TableAInner.Id) 
    from TableA as TableAInner 
    where TAbleAInner.Reference=TableAOuter.Id) = 0 
); 

Answer 1

對我來說，這看起來像：

var query = from row in tableOuter 
      group row by new { row.Name, row.Id } into g 
      where !tableInner.Any(inner => inner.Reference == g.Key.Id) 
      select g.Key.Name; 

雖然我會忍不住執行濾波在分組之前 - 此時您可以將行名稱分組：

var query = from row in tableOuter 
      where !tableInner.Any(row => inner.Reference == row.Id) 
      group row.Name by new { row.Name, row.Id }; 

I 認爲應該做同樣的事情吧？