CREATE TABLE table_name_29 (heavy_attacks VARCHAR2, luftflotte_2_sorties VARCHAR2)

How many heavy attacks did the 450 Luftflotte 2 conduct?
SELECT COUNT(heavy_attacks) FROM table_name_29 WHERE luftflotte_2_sorties = 450
SELECT COUNT("heavy_attacks") FROM "table_name_29" WHERE "luftflotte_2_sorties" = 450