อะไรคือความแตกต่างระหว่างพื้นที่เพาะปลูกระหว่างไม้ Madingley และไม้ Hayley ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
what is the acreage difference between madingley wood and hayley wood ?It is not neccessary to use all the tables.
 table_204_124:  id [ number]  "no." [ number]  "name" [ text]  "area\nha" [ number]  "area\nacres" [ number]  "references" [ text] 
SELECT ABS((SELECT "area\nacres" FROM table_204_124 WHERE "name" = 'madingley wood') - (SELECT "area\nacres" FROM table_204_124 WHERE "name" = 'hayley wood'))