資料庫查詢錯誤，條件是 select main.chinesef, COALESCE( scunp89.chap) as chap,COALESCE( scunp89.sec) as sec,COALESCE( scunp89.id) as id,main.engs,scunp89.txt from scunp89,main where main.engs=COALESCE( scunp89.engs) and main.chineses='可' and COALESCE( scunp89.chap)=8 and COALESCE( scunp89.sec)=31—9 order by scunp89.id !