CG_Intersection — Computes the intersection of two geometries
geometry CG_Intersection( geometry geomA ,  geometry geomB );
Computes the intersection of two geometries.
Performed by the SFCGAL module
                 
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                 NOTE: this function returns a geometry representing the intersection.  | 
            
Availability: 3.5.0
            
 Questo metodo richiede il backend SFCGAL. 
SELECT ST_AsText(CG_Intersection('LINESTRING(0 0, 5 5)', 'LINESTRING(5 0, 0 5)'));
                cg_intersection
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                POINT(2.5 2.5)
                (1 row)