关系数据库上基于索引的Top-N关键词查询

摘要

为了实现关系数据库上自由态的同的权值来改进信息检索中传统的排序方法.对每个查询用索引表和改进的排序方法来获得Top-N答案.用实际数据集进行了实验,实验结果表明此方法在查询时间和准确性上是有效的.%The authors provide a method based on an index and realize keyword search in the free form over relational databases. Using the saved knowledge, the authors create an index and improve the classic ranking strategy in Information Retrieval by assigning different weight values to attributes. Then the top-N answers are returned for a keyword query. Experimental results for a large real dataset indicate that the performance of the method is efficient and effective.