1ST_Perimeter - Linestring (Long/Lat metric - GreatCircle) 2:memory: #use in-memory database 3SELECT ST_Perimeter(GeomFromText('LINESTRING(0.7 0.7, 0.7 0.8, 0.8 0.8, 0.8 0.7, 0.7 0.8)'), 0); 41 # rows (not including the header row) 51 # columns 6ST_Perimeter(GeomFromText('LINESTRING(0.7 0.7, 0.7 0.8, 0.8 0.8, 0.8 0.7, 0.7 0.8)'), 0) 70.0 8