CREATE TABLE table_24316 ("Competition" CLOB, "Round" CLOB, "Opponent" CLOB, "Result" CLOB, "Score" CLOB, "Home/Away" CLOB, "Venue" CLOB, "Attendance" CLOB, "Date" CLOB)

How many opponents did they play on 17/05/2009?
SELECT COUNT("Opponent") FROM table_24316 WHERE "Date" = '17/05/2009'
SELECT COUNT("Opponent") FROM "table_24316" WHERE "Date" = '17/05/2009'