SQL语句问题!!!!!!!!
strsql="select bookcity_class.*,bookcity_book.* from bookcity_class outer join bookcity_book
where bookcity_class.class_id=bookcity_book.class_id
order by class_id, addtime desc"
我要把2个表(bookcity_class,bookcity_book)合起来显示在页面,2个表用class_id这个字段联系起来,上述写法有何问题?