CREATE TABLE table_45779 ("Tie no" CLOB, "Home team" CLOB, "Score" CLOB, "Away team" CLOB, "Date" CLOB)

Which Tie number had Middlesbrough as the away team?
SELECT "Tie no" FROM table_45779 WHERE "Away team" = 'middlesbrough'
SELECT "Tie no" FROM "table_45779" WHERE "Away team" = 'middlesbrough'