A Query Optimization Algorithm Based on Multiple Join Attribute

Database query operation is the most common operation.Because the data in a distributed database is distributed and redundant,query optimization study of a distributed database is one of the core issues.In order to improve the efficiency of distributed database queries,the paper analyzes and discusses the common implementation strategy based on the direct-join,and presents an improved direct-join query optimization strategy for the distributed database applications for multi-table joins when there are multiple connection properties.Improved algorithm improves query execution parallelism,reduces the query processing time and improves the query efficiency.