*1. Introduction
*Definition, Applications, Differences, Storage
*2. Queries
*2.1. Querying in Cougar
*2.2. Querying in TinyDB
*2.3. In-network Aggregation
*3. Other Issues

* From a data storage point of view, a sensor network database :
*“a distributed database that collects physical measurements about the environment, indexes them, and serves queries from users and other applications external to or from within the network”
*Research in sensor network databases:
• relatively new
• can benefit from current efforts in data streams and P2P networks
*

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