An Aggregation Partition-based Query Decomposition Method for Distributed Databased

Distributed database functions to store data in different devices,which requires that the manipulation of the data in different computers be carried out simultaneously in order for query,the operation with high frequency,to be possible and thus imposes a higher requirement for the query process.In this paper we give a full discussion on a branch of distributed query process,query decomposition and introduce an method of query decomposition based on aggregation partition.It is efficient in changing a global query into subqueries which further can be done in many local databases.