CREATE TABLE table_50009 ("Tie no" CLOB, "Home team" CLOB, "Score" CLOB, "Away team" CLOB, "Date" CLOB)

What date was Leeds United the away team?
SELECT "Date" FROM table_50009 WHERE "Away team" = 'leeds united'
SELECT "Date" FROM "table_50009" WHERE "Away team" = 'leeds united'