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='約' and COALESCE( scunp89.chap)=18 and COALESCE( scunp89.sec)=39—19 order by scunp89.id !