CREATE TABLE table_20103 ("Club" CLOB, "Played" CLOB, "Won" CLOB, "Drawn" CLOB, "Lost" CLOB, "Points for" CLOB, "Points against" CLOB, "Points difference" CLOB, "Tries For" CLOB, "Tries Against" CLOB, "Try Bonus" CLOB, "Losing Bonus" CLOB, "Points" CLOB)

How many teams have 21 tries for?
SELECT COUNT("Points difference") FROM table_20103 WHERE "Tries For" = '21'
SELECT COUNT("Points difference") FROM "table_20103" WHERE "Tries For" = '21'