ผู้เล่นคนใดมีสโมสร/จังหวัดดิเรโตน้อยกว่า 21 แคปและมีตำแหน่งล็อค?ไม่จำเป็นที่จะต้องใช้โต๊ะทั้งหมด
Which player has a Club/province of direito less than 21 caps and a Position of lock?It is not neccessary to use all the tables.
 table_name_99:  (player [ VARCHAR ] position [ VARCHAR ] club_province [ VARCHAR ] caps [ VARCHAR) ]
SELECT player FROM table_name_99 WHERE club_province = "direito" AND caps < 21 AND position = "lock"