Sql server SQL地理字符串解析

为什么这样做有效

select geography::STGeomFromText('POINT(-77.010996 38.890358)',4326)

但事实并非如此

declare @Latitude decimal(9,6) = 38.890358  
declare @Longitude decimal(9,6) = -77.010996

select geography::STGeomFromText('''POINT(' + 
cast(@Longitude as nvarchar(15)) + ' ' + 
cast(@Latitude as nvarchar(15)) +')''',4326)

---

我遗漏了什么，它们似乎实际上是一样的。

去掉开头和结尾的多余引号

declare @Latitude decimal(9,6) = 38.890358  
declare @Longitude decimal(9,6) = -77.010996

select geography::STGeomFromText('POINT(' + 
cast(@Longitude as nvarchar(15)) + ' ' + 
cast(@Latitude as nvarchar(15)) +')',4326)

---

去掉开头和结尾的多余引号

declare @Latitude decimal(9,6) = 38.890358  
declare @Longitude decimal(9,6) = -77.010996

select geography::STGeomFromText('POINT(' + 
cast(@Longitude as nvarchar(15)) + ' ' + 
cast(@Latitude as nvarchar(15)) +')',4326)

---

哇，我觉得自己像个傻瓜。谢谢，这只是一个大脑放屁的时刻。哇，我觉得自己像个傻瓜。只是一个大脑放屁的时刻，谢谢。