CREATE TABLE table_1449176_1 (density__inhabitants_km_2__ VARCHAR, common_of VARCHAR)

The common of Chieri has what population density?
SELECT density__inhabitants_km_2__ FROM table_1449176_1 WHERE common_of = "Chieri"
SELECT "density__inhabitants_km_2__" FROM "table_1449176_1" WHERE "Chieri" = "common_of"