用make a different,造句。 If they had difficulties, the Chair would be willing to make a different arrangement. 如果它们有困难的话,主席愿意 作出不...
SQl语句的级联删除问题 删除应该有顺序 1，删除link表 delete from ref,link where ref.link_code=link.link_code and link_id=? delete from link where li...
