få SDO_GTYPE fra SDO_DIFFERENCE
påhttp://download-west.oracle.com/otn_hosted_doc/intermedia/inter.816/a77132/sdo_objg.htm#857514
ses eksemplet:
-- Return the topological difference of two geometries.
SELECT SDO_GEOM.SDO_DIFFERENCE(c_a.shape, m.diminfo, c_c.shape, m.diminfo)
FROM cola_markets c_a, cola_markets c_c, user_sdo_geom_metadata m
WHERE m.table_name = 'COLA_MARKETS' AND m.column_name = 'SHAPE'
AND c_a.name = 'cola_a' AND c_c.name = 'cola_c';
Denne query returnerer en polygon.
hvordan udbygger jeg denne query så den kun returnerer f.eks. SDO_GTYPE fra denne polygon!?!
