CREATE TABLE "south_wairarapa_district" (
  "name" text,
  "years" text,
  "gender" text,
  "area" text,
  "authority" text,
  "decile" real,
  "roll" real
);

Question: tell me the average roll for the featherston area and integrated authority.
SQL: SELECT AVG("roll") FROM "south_wairarapa_district" WHERE "area"='featherston' AND "authority"='integrated';

Question: tell me the authority that has a decile less than 6 and roll less than 65.
SQL: SELECT "authority" FROM "south_wairarapa_district" WHERE "decile"<6 AND "roll"<65;

Question: tell me the average roll for pirinoa school.
SQL: SELECT AVG("roll") FROM "south_wairarapa_district" WHERE "name"='pirinoa school';

Question: tell me the total number of decile with a roll showing 251.
SQL: SELECT COUNT("decile") FROM "south_wairarapa_district" WHERE "roll"=251;