CREATE TABLE "quarterfinal_3" (
  "rank" real,
  "athlete" text,
  "country" text,
  "time" text,
  "notes" text
);

Question: What is the time for Estonia with sc/d notes?
SQL: SELECT "time" FROM "quarterfinal_3" WHERE "notes"='sc/d' AND "country"='estonia';

Question: What is the time for the rank after 5 with sc/d notes?
SQL: SELECT "time" FROM "quarterfinal_3" WHERE "notes"='sc/d' AND "rank">5;

Question: What was Law Hiu Fung's time?
SQL: SELECT "time" FROM "quarterfinal_3" WHERE "athlete"='law hiu fung';

Question: What is the time for the rank after 5 with sc/d notes?
SQL: SELECT "time" FROM "quarterfinal_3" WHERE "notes"='sc/d' AND "rank">5;

Question: What is the highest rank for a 6:52.70 time and notes of sa/b?
SQL: SELECT MAX("rank") FROM "quarterfinal_3" WHERE "notes"='sa/b' AND "time"='6:52.70';