Abstract: Wireless sensor networks are data-centric networks in nature,they deal with continuous data streams collected by sensor nodes. Therefore, existing data management technologies view wireless sensor network as a distributed database system composed of continuous data streams which come from the physical world. Due to the limitations of Sensor nodes' computing power, storage capacity, communication capabilities and battery energy, combined with the characteristics of flash memory and data streams,these lead to some challenges that the traditional distributed database systems have not encountered for data managements.This paper introduced the database system architecture, data storage and index technologies, data models, and query processing and optimization technologies for wireless sensor networks.

Key words: Wireless sensor network,Data management,Data model,Data storage, Query optimization,Data mining