Question: How many codes have a density of 621.68, and a Land area (hectares) larger than 75.28?
SQL: SELECT SUM("Code") FROM "2-16796625-1" WHERE "Density (inh./km²)" = 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./km²)") FROM "2-16796625-1" WHERE "Land area (hectares)" = 123.02 AND "Code" > 2356.0;

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 "2-16796625-1" WHERE "Density (inh./km²)" = 815.48 AND "Population" > 411.0;