Name the poles for season 2006
CREATE TABLE "by_season" (
  "season" real,
  "driver" text,
  "owner" text,
  "number" text,
  "make" text,
  "starts" text,
  "wins" real,
  "top_tens" real,
  "poles" real,
  "points_margin" text
);
SELECT "poles" FROM "by_season" WHERE "season"=2006;