CREATE TABLE table_37424 ("Round" FLOAT, "Pick" FLOAT, "Player" CLOB, "Position" CLOB, "School/Club Team" CLOB)

How many Picks have a Position of defensive back?
SELECT COUNT("Pick") FROM table_37424 WHERE "Position" = 'defensive back'
SELECT COUNT("Pick") FROM "table_37424" WHERE "Position" = 'defensive back'