Book Image

SQL Server 2016 Developer's Guide

By : Miloš Radivojević, Dejan Sarka, William Durkin
Book Image

SQL Server 2016 Developer's Guide

By: Miloš Radivojević, Dejan Sarka, William Durkin

Overview of this book

Microsoft SQL Server 2016 is considered the biggest leap in the data platform history of the Microsoft, in the ongoing era of Big Data and data science. This book introduces you to the new features of SQL Server 2016 that will open a completely new set of possibilities for you as a developer. It prepares you for the more advanced topics by starting with a quick introduction to SQL Server 2016's new features and a recapitulation of the possibilities you may have already explored with previous versions of SQL Server. The next part introduces you to small delights in the Transact-SQL language and then switches to a completely new technology inside SQL Server - JSON support. We also take a look at the Stretch database, security enhancements, and temporal tables. The last chapters concentrate on implementing advanced topics, including Query Store, column store indexes, and In-Memory OLTP. You will finally be introduced to R and learn how to use the R language with Transact-SQL for data exploration and analysis. By the end of this book, you will have the required information to design efficient, high-performance database applications without any hassle.
Table of Contents (21 chapters)
SQL Server 2016 Developer's Guide
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
12
In-Memory OLTP Improvements in SQL Server 2016

Modifying JSON data


You might sometimes need to update only a part of JSON data. In SQL Server 2016, you can modify JSON data using the JSON_MODIFY function. It allows you to:

  • Update the value of an existing property

  • Add a new element to an existing array

  • Insert a new property and its value

  • Delete a property based on a combination of modes and provided values

The function accepts three mandatory input arguments:

  • Expression: This is a variable or column name containing JSON text

  • Path: This is the JSON path expression with an optional modifier append

  • new_value: This is the new value for the property specified in the path expression

The JSON_MODIFY function returns the updated JSON string. In the next subsections, you will see this function in action.

Adding a new JSON property

In the following code example, you add a new property named IsVinyl with the value true:

DECLARE @json NVARCHAR(MAX) = N'{ 
"Album":"Wish You Were Here", 
"Year":1975 
}'; 
PRINT JSON_MODIFY(@json, '$.IsVinyl...