将SQL转换为LINQ

Question

如何将以下SQL语句转换为C＃中的LINQ语句？

select BLDG_CODE, count(ROOM) "Number of Rooms"
from LOCATION
group by BLDG_CODE;

非常感谢

Answer 1

var query = from l in Locations
            group l by l.BLDG_CODE into g
            select new { 
                BLGD_CODE = g.Key,
                NumberOfRooms = g.Count()
            };

Answer 2

或者，如果您更喜欢方法语法......

var query = Locations.GroupBy(location => location.BLDG_CODE)
                     .Select(group => new {  
                                            BuildingCode = group.Key,
                                            NumberOfRooms = group.Count()
                                          });