Table: sweden_urban_areas
Columns: urban_area_locality
population
land_area_hectares
density_inh_km
code

Question: How many codes have a density of 621.68, and a Land area (hectares) larger than 75.28?
SQL: SELECT SUM("code") FROM sweden_urban_areas WHERE "density_inh_km" = 621.68 AND "land_area_hectares" > 75.28

Question: What is the average density with a land area of 123.02, and a Code larger than 2356?
SQL: SELECT AVG("density_inh_km") FROM sweden_urban_areas WHERE "land_area_hectares" = 123.02 AND "code" > 2356

Question: What is the average land area with a density of 815.48, and a Population larger than 411?
SQL: SELECT AVG("land_area_hectares") FROM sweden_urban_areas WHERE "density_inh_km" = 815.48 AND "population" > 411