按照空间属性聚集这些行的效果取决于在查询时对一个数据子集的访问。
The effects of clustering the rows by their spatial properties rely on accessing just a subset of the data during query time.
因此，下面的查询根据空间数据类型的属性来计算数据的宽度。
Therefore, the following queries calculate the size of the data based on the attributes of the spatial data types.
左上角的框架显示查询，下面的框架显示s VG输出，右上角的框架则显示非空间属性。
We show the queries in the upper left frame, the rendered SVG output in the lower frame, and the non-spatial attributes in the upper right frame.
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