Table: draft_picks_51
Columns: pick
player
team
position
school

Question: What position does the player from the Arizona Diamondbacks play?
SQL: SELECT "position" FROM draft_picks_51 WHERE "team" = 'arizona diamondbacks'

Question: What school did P Jay Gehrke of the Kansas City Royals attend?
SQL: SELECT "school" FROM draft_picks_51 WHERE "position" = 'p' AND "team" = 'kansas city royals' AND "player" = 'jay gehrke'