What is the total number of long Dubose, E., who had 0 losses, a gain less than 17, and an avg/g bigger than 0, had?
CREATE TABLE "rushing" (
  "name" text,
  "gain" real,
  "loss" real,
  "long" real,
  "avg_g" real
);
SELECT COUNT("long") FROM "rushing" WHERE "loss"=0 AND "gain"<17 AND "avg_g">0 AND "name"='dubose, e.';