What the most samples failed for 可淇牌嬰幼兒配方乳粉 and had less than 1 samples taken?
CREATE TABLE "tests_conducted_by_aqsiq" (
  "producer" text,
  "product" text,
  "samples_taken" real,
  "samples_failed" real,
  "melamine_content_mg_kg" real
);
SELECT MAX("samples_failed") FROM "tests_conducted_by_aqsiq" WHERE "product"='可淇牌嬰幼兒配方乳粉' AND "samples_taken"<1;