CREATE TABLE "population" (
  "district" text,
  "district_headquarters" text,
  "area_km_2" real,
  "population_1991_census" real,
  "population_2001_census" real
);

Question: How many km2  has a Population 2001 Census larger than 274,095, and a District Headquarters of jharsuguda?
SQL: SELECT COUNT("area_km_2") FROM "population" WHERE "population_2001_census">'274,095' AND "district_headquarters"='jharsuguda';

Question: What is the number of Population 2001 Census that has 476,815 in Population 1991 Census?
SQL: SELECT SUM("population_2001_census") FROM "population" WHERE "population_1991_census"='476,815';

Question: What is the number of Population 2001 Census that has  jharsuguda District Headquarters with an Area smaller than 2,081?
SQL: SELECT COUNT("population_2001_census") FROM "population" WHERE "district_headquarters"='jharsuguda' AND "area_km_2"<'2,081';