How many pac-12 sports are shown for california polytechnic state university?
CREATE TABLE "affiliate_members" (
  "institution" text,
  "location" text,
  "founded" real,
  "type" text,
  "enrollment" real,
  "nickname" text,
  "current_conference" text,
  "pac_12_sports" text
);
SELECT COUNT("pac_12_sports") FROM "affiliate_members" WHERE "institution"='California Polytechnic State University';