Approximate Functional Dependencies Based Query Evaluation Improvement
Xiaohui Tang · Gongcheng shuxue xuebao · 2007
Query evaluation improvement and approximate functional dependencies(AFD) are two important research topics in data query and management. In this paper,the relations are decomposed with respect to the discovered AFDs,and several basic data queries are reformulated in light of ex-pressive equivalence,aimed at reducing time cost. This is helpful for processing queries in an e?cient manner.