CREATE TABLE table_2508633_11 (college VARCHAR, nfl_team VARCHAR, position VARCHAR)

In which colleges is the NFL Team New York Giants and with the position defensive back?
SELECT college FROM table_2508633_11 WHERE nfl_team = "New York Giants" AND position = "Defensive back"
SELECT "college" FROM "table_2508633_11" WHERE "Defensive back" = "position" AND "New York Giants" = "nfl_team"