CREATE TABLE table_21458142_1 (total_copies_sold VARCHAR2, release_date VARCHAR2)

How many copies were sold of the game released on october 23, 2008?
SELECT total_copies_sold FROM table_21458142_1 WHERE release_date = "October 23, 2008"
SELECT "total_copies_sold" FROM "table_21458142_1" WHERE "October 23, 2008" = "release_date"