CREATE TABLE table_name_49 (date VARCHAR, score_f_a VARCHAR, opponents VARCHAR)

Score F A of 2 0, and a Opponents of walsall has what date?
SELECT date FROM table_name_49 WHERE score_f_a = "2–0" AND opponents = "walsall"
SELECT "date" FROM "table_name_49" WHERE "2–0" = "score_f_a" AND "opponents" = "walsall"