CREATE TABLE table_name_30 (school VARCHAR2, player VARCHAR2, position VARCHAR2, team VARCHAR2)

What school did P Jay Gehrke of the Kansas City Royals attend?
SELECT school FROM table_name_30 WHERE position = "p" AND team = "kansas city royals" AND player = "jay gehrke"
SELECT "school" FROM "table_name_30" WHERE "jay gehrke" = "player" AND "kansas city royals" = "team" AND "p" = "position"