CREATE TABLE table_204_547 (id DECIMAL, "rank" DECIMAL, "lane" DECIMAL, "name" TEXT, "nationality" TEXT, "time" DECIMAL, "notes" TEXT)

out of all their times , which one was fastest ?
SELECT "time" FROM table_204_547 ORDER BY "time" LIMIT 1
SELECT "time" FROM "table_204_547" ORDER BY "time" NULLS FIRST LIMIT 1