一种基于时间相关属性的双时态改进模型

Improved model based on time-related attributes in bi-temporal relationship database

提出了一种改进的双时态关系模型,并给出了模型之上的插入、修改等相关操作.该模型对时间相关属性和非相关属性明确地加以区分,满足了数据分析工作中时间相关属性针对性的需要,同时,可以加快一般情况下时态数据库的插入和修改的速度,并定义了类似于对象标号的主题标号属性"hostNo",在一定程度上减少了查询中连接操作出现的频度,提高了效率.

An improved bi-temporal relationship model and the related operations such as insert, update and other was presented. This model can clearly differentiate between time-related attributes and normal ones. Then, it can make the analyzing work on temporal data more beneficial. Also, it can accelerate speed when inserting a new record into the database or updating some existed data. In addition, it uses an attribute called ＂hostNo＂, similar to the object number to reduce the frequency of link operation and increase the efficiency.