CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "attendance" real
);

Question: Total weeks of 49,980 attendance?
SQL: SELECT SUM("week") FROM "schedule" WHERE "attendance"='49,980';

Question: Mean attendance for December 22, 1980?
SQL: SELECT AVG("attendance") FROM "schedule" WHERE "date"='december 22, 1980';

Question: Overall attendance for week 4?
SQL: SELECT "attendance" FROM "schedule" WHERE "week"=4;