What is the highest silver that has 9 as the rank, germany as the nation, with a gold less than 0?
CREATE TABLE "medal_table" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT MAX("silver") FROM "medal_table" WHERE "rank"=9 AND "nation"='germany' AND "gold"<0;