CREATE TABLE "medals_by_republic" (
  "rank" real,
  "republic" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);

Question: Can you tell me total number of Silver that has the Republic of latvian ssr, and the Total larger than 6?
SQL: SELECT COUNT("silver") FROM "medals_by_republic" WHERE "republic"='latvian ssr' AND "total">6;