ST_EnvelopeAggr method

Returns the bounding rectangle for all of the geometries in a group

This method can not be used with geometries in round-Earth spatial reference system.

ST_Geometry::ST_EnvelopeAggr(geometry-column)

Name	Type	Description
geometry-column	ST_Geometry	The geometry values to generate the bounding rectangle. Typically this is a column.

ST_Polygon Returns a polygon that is the bounding rectangle for all the geometries in a group.
The spatial reference system identifier of the result is the same as that for the first parameter.

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