Index is an important element in databases, and the existence of index is unavoidable. When an index has been built on a particular attribute, database operations (e.g. selection,...
Query processing in database systems may be improved by applying parallel processing techniques. One reason for improving query response time is to support the increased number que...
System developments and research on parallel query processing have concentrated either on "Shared Everything" or "Shared Nothing" architectures so far. While t...
Spatial queries for extracting data from wireless sensor networks are important for many applications, such as environmental monitoring and military surveillance. One such query i...
vices provide an important abstract layer on top of heterogeneous components (hardware and software) that take part into a grid environment. In this scenario, applications, like sc...