How many matches were played that resulted in less than 59.1 overs and a 6.78 Economy rate?
CREATE TABLE "most_wickets" (
  "player" text,
  "team" text,
  "matches" real,
  "overs" real,
  "wickets" real,
  "economy_rate" real,
  "average" real,
  "strike_rate" real,
  "best_bowling" text
);
SELECT SUM("matches") FROM "most_wickets" WHERE "overs"<59.1 AND "economy_rate">6.78;