1union - MULTILINESTRING (two Lines) 2:memory: #use in-memory database 3SELECT AsText(GUnion(GeomFromText('LINESTRING(30 30, 31 31)'), GeomFromText('LINESTRING(20 20, 10 10)'))); 41 # rows (not including the header row) 51 # columns 6AsText(GUnion(GeomFromText('LINESTRING(30 30, 31 31)'), GeomFromText('LINESTRING(20 20, 10 10)'))) 7MULTILINESTRING((30 30, 31 31), (20 20, 10 10)) 8