Home » View Updating and Relational Theory by Christopher J. Date
View Updating and Relational Theory Christopher J. Date

View Updating and Relational Theory

Christopher J. Date

Published December 20th 2012
ISBN : 9781449357801
ebook
260 pages
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 About the Book 

Views are virtual tables. That means they should be updatable, just as real or base tables are. In fact, view updatability isnt just desirable, its crucial, for practical reasons as well as theoretical ones. But view updating has always beenMoreViews are virtual tables. That means they should be updatable, just as real or base tables are. In fact, view updatability isnt just desirable, its 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 dont violate any integrity constraints). More generally, it shows how updating always ought to work, regardless of whether the target is a base table or a view. The proposed scheme is 100% consistent with the relational model, but rather different from the way updating works in SQL products today.This book can: Help database products improve in the futureHelp with a roll your own implementation, absent such product improvementsMake you aware of the crucial role of predicates and constraintsShow you how relational products are really supposed to behaveAnyone with a professional interest in the relational model, relational technology, or database systems in general can benefit from this book.