Table: redskins_drafts
Columns: round
pick
overall
name
position
college

Question: What was the overall draft pick of the player who was a db and attended college in iowa?
SQL: SELECT "overall" FROM redskins_drafts WHERE "college" = 'iowa' AND "position" = 'db'

Question: What number pick was the player drafted in round 3 at #28 overall?
SQL: SELECT AVG("pick") FROM redskins_drafts WHERE "overall" < 28 AND "round" = 3