CREATE TABLE table_46645 ("Date" CLOB, "Opponent#" CLOB, "Rank #" CLOB, "Site" CLOB, "Result" CLOB, "Attendance" CLOB)

Who was the opponent that played against the Buckeyes on October 17?
SELECT "Opponent#" FROM table_46645 WHERE "Date" = 'october 17'
SELECT "Opponent#" FROM "table_46645" WHERE "Date" = 'october 17'