Semantic technology is a set of methods and tools that provide advanced means for categorizing and processing data, as well as for discovering relationships within varied data sets.
Sparsity and density are terms used to describe the percentage of cells in a database table that are not populated and populated, respectively. The sum of the sparsity and density should equal 100%.
A virtual cube is a subset of one or two existing cubes in a database. Database administrators create virtual cubes for security purposes and/or to enable analysis of the shared data.
VoltDB is an in-memory database. The software is available in an open-source community edition and in a commercial release from vendor VoltDB Inc.