Table: afl_draft_1967
Columns: overall_pick
afl_team
player
position
college

Question: What is the pick number of the defensive back?
SQL: SELECT COUNT("overall_pick") FROM afl_draft_1967 WHERE "position" = 'Defensive Back'

Question: What is the position for the pick number 17?
SQL: SELECT "position" FROM afl_draft_1967 WHERE "overall_pick" = 17

Question: What is the college of the afl team of buffalo bills?
SQL: SELECT "college" FROM afl_draft_1967 WHERE "afl_team" = 'Buffalo Bills'

Question: What is the position of john charles?
SQL: SELECT "position" FROM afl_draft_1967 WHERE "player" = 'John Charles'

Question: What is the largest pick number of the new york jets?
SQL: SELECT MAX("overall_pick") FROM afl_draft_1967 WHERE "afl_team" = 'New York Jets'

Question: What is the afl team of the offensive guard?
SQL: SELECT "afl_team" FROM afl_draft_1967 WHERE "position" = 'Offensive Guard'