使用SQL geography获取某个点半径内的位置

我有一个SQL表列，其地理类型为：

create table dbo.Events
(
  Id int identity not null 
    constraint PK_Events_Id primary key clustered (Id),
  Localization geography not null
);

如何获取半径为40公里的所有事件？这可能吗

谢谢,， 米格尔

---

STDistance的结果将以米为单位

假设您有要搜索的点的纬度和经度：

DECLARE @Origin GEOGRAPHY,
        -- distance defined in meters
        @Distance INTEGER = 40000;        

-- center point
SET @Origin = GEOGRAPHY::STGeomFromText('POINT(-122.084039 37.42227)', 4326);

-- return all rows from events in 40km radius
SELECT * FROM dbo.Events WHERE @Origin.STDistance(Localizaton) <= @Distance;

---

不使用STGeoFromText，我只需要设置@Origin=geography:：Point-34.5923540138.74606204326

DECLARE @Origin GEOGRAPHY,
        -- distance defined in meters
        @Distance INTEGER = 40000;        

-- center point
SET @Origin = GEOGRAPHY::STGeomFromText('POINT(-122.084039 37.42227)', 4326);

-- return all rows from events in 40km radius
SELECT * FROM dbo.Events WHERE @Origin.STDistance(Localizaton) <= @Distance;