CREATE TABLE "demographics" (
  "country" text,
  "area_km" text,
  "population_2011_est" text,
  "population_density_per_km" text,
  "gdp_ppp_m_usd" text
);

Question: How much is the GDP for a population density of 254.7?
SQL: SELECT "gdp_ppp_m_usd" FROM "demographics" WHERE "population_density_per_km"='254.7';

Question: Which country has a population density of 50.3?
SQL: SELECT "country" FROM "demographics" WHERE "population_density_per_km"='50.3';

Question: How much is the GDP for an area of 61,395?
SQL: SELECT "gdp_ppp_m_usd" FROM "demographics" WHERE "area_km"='61,395';

Question: How much is the population density with a GDP at $188,112?
SQL: SELECT "population_density_per_km" FROM "demographics" WHERE "gdp_ppp_m_usd"='$188,112';

Question: How much is the GDP for an area of 116?
SQL: SELECT "gdp_ppp_m_usd" FROM "demographics" WHERE "area_km"='116';

Question: Which country has a population of 3,221,216?
SQL: SELECT "country" FROM "demographics" WHERE "population_2011_est"='3,221,216';