Introduction
Y
ou’ve probably heard about NoSQL, and you may wonder
what it is. NoSQL represents a fundamental change in the
way people think about storing and accessing data, especially
now that most of the information generated is unstructured
or semi-structured data—something for which existing data-
base systems such as Oracle, MySQL, SQLServer, and Postgres
aren’t well suited.
NoSQL casts a very wide net (trying to offer a precise defini-
tion of NoSQL is like trying to nail gelatin to a tree). Search
for NoSQL databases on the Internet, and you’re likely to
find some common themes, such as non-relational, horizon-
tally scalable, and (mostly) schema-agnostic. But what does
that mean? NoSQL means a release from the constraints
imposed on database management systems by the relational
database model.
About This Book
Enterprise NoSQL For Dummies, MarkLogic Special Edition,
provides an overview of NoSQL. You start to understand what
it is, what it isn’t, when you should consider using a NoSQL
database instead of a relational database management system
(RDBMS) and when you may want to use both. In addition,
this book introduces enterprise NoSQL and shows how it dif-
fers from other NoSQL systems.
NoSQL may not be a solution for every data storage problem.
Also, not all NoSQL databases are created equal, or even
equel. (Sorry—a little database humor there.) Though I cer-
tainly hope that you read the book cover to cover, the book
is organized in such a way that you can sample the chapters
that you find most interesting and useful in whatever order
you want.
These materials are © 2014 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited.
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