Which is the total number in the 2010 Census in Oconee County where the area in square miles was less than 674?
CREATE TABLE "counties" (
  "county" text,
  "year_founded" text,
  "county_seat" text,
  "2010_census_population" real,
  "july_1_2012_population_estimate" real,
  "area_sq_mi" real,
  "land_area_sq_mi" real
);
SELECT SUM("2010_census_population") FROM "counties" WHERE "county"='oconee county' AND "area_sq_mi"<674;