概率数据模型查询方法的研究

Research on the Search of Probabilistic Data Model

随着信息化进程的推进,在很多重要应用领域发现了大量的不确定性数据,概率是解决不确定信息的比较适用的方法。经典关系数据库处理不了具有概率的数据,所以要对此种数据库在这方面加以推广,也就是概率数据模型。在概率数据库中使用传统的查询方法会使查询结果出现偏差,不能满足用户的需求。因此,基于不确定数据的查询处理受到了越来越多的关注。对此进行了研究。

With the advance processing of the information,at present,in many important applications,there is a great deal of uncertain data,The probability is applicable method in resolving the comparison of uncertain information.Classical relational database can not pro-cess the data with a probability,so for such a database in this respect and promote,that is,the probabilistic data model..Using the tradi-tional methods in probabilistic database would lead to the deviation of query results,it does not meet the needs of users.Therefore,based on uncertain data,more and more attentions are focused on the query processing.