รอบใดมีทีม Edmonton oilers ของ NHL และผู้เล่นของ vyacheslav trukhno?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
Which Round has a NHL team of edmonton oilers and a Player of vyacheslav trukhno?It is not neccessary to use all the tables.
 table_name_12:  (round [ INTEGER ] nhl_team [ VARCHAR ] player [ VARCHAR) ]
SELECT AVG(round) FROM table_name_12 WHERE nhl_team = "edmonton oilers" AND player = "vyacheslav trukhno"