Once the view is created by outjoin, those existing algorithms may fail in view maintenance. This paper introduce a new view maintenance algorithm, which can handle view involving outjoin, regular join and data inconsistency.
针对传统的视图维护算法在有外连接或数据不一致的情况下会出现错误的问题,本文提出了一种新的视图维护算法:VMDT算法,该算法不仅解决了外连接及数据不一致问题,而且最大限度地减少了国防科学技术大学研究生院学位论文MDBS与LDB之间的通信量,解决了嵌套异常问题。
参考来源 - 多数据库系统中关键技术的研究·2,447,543篇论文数据,部分数据来源于NoteExpress
Jazz was in its heyday back then, and when she got out of the conservatory, she was invited to join a jazz orchestra.
那时爵士乐正处于鼎盛时期,她从音乐学院毕业时,受邀加入了一个爵士乐团。
I have plenty of volunteer experiences and it is from these experiences that I was chosen out of 400 people who wanted to join to serve in this group.
我有很多志愿者的经历,也正是因为这些经历,我才从400个人中被选中加入这个团队。
The two states will join the 25-nation bloc provided they carry out reforms.
这两个国家将加入25国集团,前提是他们要进行改革。
They join automaker General Motors and delivery service FedEx, who dropped out last year.
VOA: standard.2010.01.27
My parents thought I'd lost my mind to drop out of Stanford Business School to go join some company that made software.
我父母认为我从斯坦福商学院,辍学去一家软件公司工作根本是疯了。
and find a good, I don't know, find a company to join right out of school.
在毕业后加入他们的公司。
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