LINQは - LINQ

Question

にSQLクエリ（UnionAggregate）を変換するにはどうすればそのLINQエンティティのバージョンで次のSQLクエリを変換したい：Collection.Concatが提供するすべての機能LINQ組合で

select 
geometry::UnionAggregate(geometries.GeometryBounds) 
from 
(select 
    GeometryBounds 
    from 
    Province where id in (1, 2) 
    union all 
    select 
    GeometryBounds 
    from 
    Region where id in (1, 2) 
    union all 
    select 
    GeometryBounds 
    from 
    Country where id in (1, 2) 
) as geometries 

Answer 1

（） 方法。

var ID = new[] {1, 2}; 

var query = (youContext.Province 
      .Select(x => x.GeometryBounds)) 
      .Concat 
      (youContext.Region 
      .Select(x => x.GeometryBounds)) 
      .Concat 
      (youContext.Country 
      .Select(x => x.GeometryBounds));