What is the lowest All-Time, when First Title is "2007, and when Amateur Era is greater than 0?
CREATE TABLE "champions_by_country" (
  "country" text,
  "amateur_era" real,
  "open_era" real,
  "all_time" real,
  "first_title" real,
  "last_title" real
);
SELECT MIN("all_time") FROM "champions_by_country" WHERE "first_title"=2007 AND "amateur_era">0;