include: concurrency transaction recovery .
concurrency  means that multiple users can operate on the database at the same time.
transaction    permit users to make multiple changes appear at once.
                    ACID: atomicity consistency isolation durability
recovery       surviving application and system crashes.

Posted on 2008-08-13 11:14 micheal's tech 阅读(91) 评论(0)  编辑 收藏 引用