CREATE TABLE table_12496904_1 (population_density_2012__km_2__ NUMBER, sector VARCHAR2)

What is the population density for 2012 for Gatunda sector?
SELECT MIN(population_density_2012__km_2__) FROM table_12496904_1 WHERE sector = "Gatunda"
SELECT MIN("population_density_2012__km_2__") FROM "table_12496904_1" WHERE "Gatunda" = "sector"