SQL Server空间连接-多边形中的点计数

Question

我在Azure SQL中有两层：

• 边界-多边形层，4326 SRID，称为“ 形状”的几何字段
• 作业者-点图层，4326 SRID，称为TheShape的几何

两者都有称为OBJECTID主键，并且都有适当的空间索引。

我想要一个优化的查询，该查询将向我显示每个BOUNDARY （包括边界Shape字段）内的WORKORDERS总数

SELECT a.*
FROM BOUNDARIES a
INNER JOIN 
    (SELECT
         OBJECTID,
         TheShape,
         COUNT(*) as total_count
     FROM 
         WORKORDERS
     GROUP BY 
         OBJECTID) b ON a.Shape.STIntersects(b.TheShape) = 1

出现错误：

选择列表中的“ WORKORDERS.TheShape”列无效，因为它既不包含在聚合函数中，也不包含在GROUP BY子句中。

有人可以指出我要去哪里了，这是否是实现此目标的最佳方法？

Answer 1

您需要按聚合功能不涉及的所有选定列进行分组，例如：

    SELECT a.*
    FROM BOUNDARIES a
    INNER JOIN 
        (
        SELECT
            OBJECTID,
            TheShape,
            COUNT(*) as total_count

        FROM WORKORDERS
        GROUP BY OBJECTID, TheShape
        ) b  on a.Shape.STIntersects(b.TheShape) = 1

要么

    SELECT a.*
    FROM BOUNDARIES a
    INNER JOIN 
        (
        SELECT

            TheShape,
            COUNT(*) as total_count

        FROM WORKORDERS
        GROUP BY TheShape
        ) b  on a.Shape.STIntersects(b.TheShape) = 1

无论如何，进行聚合的几何限制，您可以通过这种方式获得所需的结果

如果您需要每个BOUNDARIES的WORKORDERS数量

SELECT a.OBJECTID, count(*)
from  BOUNDARIES a
INNER JOIN WORKORDERS b on a.Shape.STIntersects(b.TheShape) = 1
GROUP BY a.OBJECTID

如果您也需要胸形

select a.OBEJECTID, a.Shape, t.my_count
from  BOUNDARIES a 
INNER JOIN 
(
    SELECT a.OBJECTID, count(*) my_count
    FROM BOUNDARIES a 
    INNER JOIN WORKORDERS b on a.Shape.STIntersects(b.TheShape) = 1
    GROUP BY a.OBJECTID
 ) t on a.OBEJECTID = t.OBEJECTID