To support the retrieval and fusion of multimedia information from multiple sources and databases, a spatial/temporal query language called ΣQL was proposed. ΣQL is based upon the σ-operator sequence and in practice expressible in SQL-like syntax. ΣQL allows a user to specify powerful spatial/temporal queries for both multimedia data sources and multimedia databases, eliminating the need to write different queries for each. In this paper, we illustrate this approach by query processing examples for information fusion applications.