CREATE TABLE table_name_54 (zone NUMBER, stations VARCHAR2, platforms VARCHAR2)

Name the average zone for waddon railway station and has more than 2 platforms
SELECT AVG(zone) FROM table_name_54 WHERE stations = "waddon railway station" AND platforms > 2
SELECT AVG("zone") FROM "table_name_54" WHERE "platforms" > 2 AND "stations" = "waddon railway station"