What was the school/club team whose season was in 2012 and were acquired via trade? 
CREATE TABLE "s" (
  "name" text,
  "position" text,
  "number" real,
  "school_club_team" text,
  "season" text,
  "acquisition_via" text
);
SELECT "school_club_team" FROM "s" WHERE "season"='2012' AND "acquisition_via"='Trade';