What is the average density with a land area of 123.02, and a Code larger than 2356?
CREATE TABLE "references" (
  "urban_area_locality" text,
  "population" real,
  "land_area_hectares" real,
  "density_inh_km" real,
  "code" real
);
SELECT AVG("density_inh_km") FROM "references" WHERE "land_area_hectares"=123.02 AND "code">2356;