Book Image

SQL Server 2017 Developer???s Guide

Book Image

SQL Server 2017 Developer???s Guide

Overview of this book

Microsoft SQL Server 2017 is a milestone in Microsoft's data platform timeline, as it brings in the power of R and Python for machine learning and containerization-based deployment on Windows and Linux. This book prepares you for advanced topics by starting with a quick introduction to SQL Server 2017's new features. Then, it introduces you to enhancements in the Transact-SQL language and new database engine capabilities before switching to a different technology: JSON support. You will take a look at the security enhancements and temporal tables. Furthermore, the book focuses on implementing advanced topics, including Query Store, columnstore indexes, and In-Memory OLTP. Toward the end of the book, you'll be introduced to R and how to use the R language with Transact-SQL for data exploration and analysis. You'll also learn to integrate Python code into SQL Server and graph database implementations as well as the deployment options on Linux and SQL Server in containers for development and testing. By the end of this book, you will be armed to design efficient, high-performance database applications without any hassle.
Table of Contents (25 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Free Chapter
1
Introduction to SQL Server 2017
Index

Graph features in SQL Server 2017


Prior to SQL Server 2017, relationships in graph structures were represented by junction tables. SQL Server 2017 supports graph databases by bringing graph extensions called SQL Graph features. SQL Graphand graph extensions are part of the SQL Server database engine. You don't need to install separate services; as soon as you install SQL Server, you can use SQL graph capabilities in all SQL Server editions.

In SQL Server 2017, you can create two types of graph objects, node and edge tables, and use the new MATCH clause to traverse through the graph. Node and edge tables are normal tables with some special columns and attributes. A graph is a collection of node and edge tables, and all tables within a database belong to the same graph. Since node and edge tables are SQL Server tables, you are allowed to create regular relationships between the tables.

To support the creation and alteration of graph tables, the CREATE/ALTER TABLE Transact-SQL statements have...