Description
Returns a geometry object which represents the union of an aggregated set of geometry objects.
Syntax
MI_AggregateUnion ( geometry )
Arguments
geometry is an expression which returns a geometry.
Example
Returns a geometry object which represents the union of an aggregated set of country geometries.
select MI_AggregateUnion([Geometry_Column]) from countries where country in ('Canada','Brazil','Argentina','Greenland')