속성으로 검색SELECT * FROM sigungu;SELECT id, name, geom FROM sigungu;SELECT id, name, geom FROM sigunguWHERE name = '마포구';CREATE OR REPLACE VIEW mapo_sigungu ASSELECT id, name, geomFROM sigunguWHERE name = '마포구';공간으로 검색CREATE OR REPLACE VIEW mapo_road_link ASSELECT rl.*FROM road_link rlJOIN mapo_sigungu msON ST_Intersects(rl.geom, ms.geom);최단 경로 검색CREATE OR REPLACE VIEW mapo_shortest_path ASWITH shor..