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Time and Relational Theory Image

Time and Relational Theory

Jun 30 2016  Time and Relational Theory provides an in-depth description of temporal database systems, which provide special facilities for storing, querying, and updating historical and future data. Traditionally, database management systems provide little or no special support for temporal data at all. This situation is changing because: * Cheap storage enables retention of large volumes of historical data in data warehouses* Users are now faced with temporal data problems, and need solutions * Temporal features have recently been incorporated into the SQL standard, and vendors have begun to add temporal...

Date on Database Image

Date on Database

Jun 30 2016  Date on Database: Writings 2000 2006 captures some of the freshest thinking from widely known and respected relational database pioneer C. J. Date. Known for his tenacious defense of relational theory in its purest form, Date tackles many topics that are important to database professionals, including the difference between model and implementation, data integrity, data redundancy, deviations in SQL from the relational model, and much more. Date clearly and patiently explains where many of todays products and practices go wrong, and illustrates some of the trouble you can get into if you dont c...

View Updating and Relational Theory Image

View Updating and Relational Theory

Jun 30 2016  Views are virtual tables. That means they should be updatable, just as real or base tables are. In fact, view updatability isn't just desirable, it's crucial, for practical reasons as well as theoretical ones. But view updating has always been a controversial topic. Ever since the relational model first appeared, there has been widespread skepticism as to whether (in general) view updating is even possible. In stark contrast to this conventional wisdom, this book shows how views, just like base tables, can always be updated (so long as the updates don't violate any integrity constraints). More...

SQL and Relational Theory Image

SQL and Relational Theory

Jun 30 2016  SQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put the theory into practice. In this insightful book, author C.J. Date explains relational theory in depth, and demonstrates through numerous examples and exercises how you can apply it directly to your use of SQL. This second edition includes new material on recursive queries, 'missing information without nulls, new update operators, and topics such as aggregate operators, grouping and ungrouping, and view updating. If you have a modest-to-advanced backgro...

Database Design and Relational Theory Image

Database Design and Relational Theory

Jun 30 2016  What makes this book different from others on database design? Many resources on design practice do little to explain the underlying theory, and books on design theory are aimed primarily at theoreticians. In this book, renowned expert Chris Date bridges the gap by introducing design theory in ways practitioners can understandamp;#8212;drawing on lessons learned over four decades of experience to demonstrate why proper database design is so critical in the first place. Every chapter includes a set of exercises that show how to apply the theoretical ideas in practice, provide additional informa...

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