CREATE TABLE table_43226 ("Card" CLOB, "Weight Class" CLOB, "Round" FLOAT, "Time" CLOB, "Method" CLOB)

What is the smallest round for the welterweight class with a preliminary card?
SELECT MIN("Round") FROM table_43226 WHERE "Weight Class" = 'welterweight' AND "Card" = 'preliminary'
SELECT MIN("Round") FROM "table_43226" WHERE "Card" = 'preliminary' AND "Weight Class" = 'welterweight'