เลือกการ์ดไว้กี่คน ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
how many guards were picked ?It is not neccessary to use all the tables.
 table_203_815:  id [ number]  "player" [ text]  "position" [ text]  "college" [ text] 
SELECT COUNT(*) FROM table_203_815 WHERE "position" = 'guard'