How many dates did Daniel Ruiz win the Spanish Grand Prix?
CREATE TABLE "table1_28925058_1" (
  "round" real,
  "date" text,
  "grand_prix" text,
  "circuit" text,
  "pole_position" text,
  "fastest_lap" text,
  "race_winner" text
);
SELECT COUNT("date") FROM "table1_28925058_1" WHERE "grand_prix"='Spanish Grand Prix' AND "race_winner"='Daniel Ruiz';