What is BP's lowest sales?
CREATE TABLE "2005_list" (
  "rank" real,
  "company" text,
  "country" text,
  "industry" text,
  "sales_billion" real,
  "profits_billion" real,
  "assets_billion" real,
  "market_value_billion" real
);
SELECT MIN("sales_billion") FROM "2005_list" WHERE "company"='bp';