DBMSs now provide essentially no temporal features at all, but this situation will soon change because of various reasons, in fact, temporal databases is almost certain to be important sooner rather than later, in the commercial world and academia. The book is organized into three sections and a set of attachments: * Introduction: Provides a detailed review of the relational model, and review of the Tutorial D language. * Laying the Foundations: Explains basic problem and introduce a temporal data base construction and operators to resolve the issue. * Building Foundations: Applies the material of the previous section to the problem of temporal database design, temporal constraints, temporal query and update, and more. * Appendix: Include references and annotated bibliographies, implementation considerations, and other topics. Main features: * Describe the approach that truly relational to the problem of temporal data. * Addresses implementation as well as the problem model. * Covers the latest research on new database design techniques, a new normal form, new relational operators, new update operators, a new approach to the problem of "granularity," support for "cyclic point types," and other things. * Includes review questions and exercises in each chapter. * Suitable for both reference and tutorial purposes.