CREATE TABLE table_9594 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Location" TEXT)

What round was the fight won or loss by a decision?
SELECT MIN("Round") FROM table_9594 WHERE "Method" = 'decision'
SELECT MIN("Round") FROM "table_9594" WHERE "Method" = 'decision'