พื้นที่ใดมีความหนาแน่นน้อยที่สุด ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
which area is the least dense ?It is not neccessary to use all the tables.
 table_203_222:  id [ number]  "category" [ text]  "#" [ number]  "name" [ text]  "hanzi" [ text] 
SELECT "name" FROM table_203_222 ORDER BY "density (/km2)" LIMIT 1