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

Chapter 11. Introducing SQL Server In-Memory OLTP

IT systems today are required to deliver the maximum performance with zero downtime and with maximum flexibility for developers and administrators. As developers, we all know that if performance of our applications is somehow lacking, then the cause of the slowdown must be in the database!

A major cause for performance problems inside database projects can be followed back to database design mistakes or to the limitations built in to the database engine to ensure data consistency for concurrent connections, or a mixture of both of these aspects.

Microsoft SQL Server adheres to the ACID theory. A simplified explanation of the ACID theory is that it describes how changes made to a database are required to fulfill four properties: Atomicity, Consistency, Isolation and Durability:

  • Atomicity states that the contents of each transaction are either processed successfully and completely or fail in their entirety; half-transactions are not possible.
  • Consistency...