資料庫查詢錯誤，條件是 select main.chinesef, COALESCE( cunp89.chap) as chap,COALESCE( cunp89.sec) as sec,COALESCE( cunp89.id) as id,main.engs,cunp89.txt from cunp89,main where main.engs=COALESCE( cunp89.engs) and main.chineses='約' and COALESCE( cunp89.chap)=18 and COALESCE( cunp89.sec)=39—19 order by cunp89.id !