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

Analytical queries in SQL Server


Supporting analytical applications in SQL Server differs quite a lot from supporting transactional applications. The typical schema for reporting queries is the star schema. In a star schema, there is one central table called a fact table and multiple surrounding tables called dimensions. The fact table is always on the many side of every relationship with every dimension. A database that supports analytical queries and uses the star schema design is called Data Warehouse (DW). Dealing with data warehousing design in detail is beyond the scope of this book. Nevertheless, there is a lot of literature available. For a quick start, you can read the data warehouse concepts MSDN blog at https://blogs.msdn.microsoft.com/syedab/2010/06/01/data-warehouse-concepts/. The WideWorldImportersDW demo database implements multiple star schemas. The following screenshot shows a subset of tables from this database that supports analytical queries for sales:

Sales star schema...