CREATE TABLE "running_backs" (
  "player" text,
  "car" real,
  "yards" text,
  "avg" text,
  "td_s" real,
  "long" text
);

Question: How many carries for jeff smoker?
SQL: SELECT SUM("car") FROM "running_backs" WHERE "player"='jeff smoker';

Question: How many average carries for the player with 3 as a long?
SQL: SELECT AVG("car") FROM "running_backs" WHERE "long"='3';