CREATE TABLE table_name_77 (round INT, overall VARCHAR, pick__number VARCHAR, position VARCHAR)

What is the highest round with a pick# of 9, overll less than 468, and position of defensive back?
SELECT MAX(round) FROM table_name_77 WHERE pick__number = 9 AND position = "defensive back" AND overall < 468
SELECT MAX("round") FROM "table_name_77" WHERE "defensive back" = "position" AND "overall" < 468 AND "pick__number" = 9