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SQL Server 2016 Developer's Guide

SQL Server 2016 Developer's Guide

By : Dejan Sarka, Radivojević, William Durkin
4.5 (8)
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SQL Server 2016 Developer's Guide

SQL Server 2016 Developer's Guide

4.5 (8)
By: Dejan Sarka, Radivojević, 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 (15 chapters)
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12
12. In-Memory OLTP Improvements in SQL Server 2016

What is temporal data?


In a table with temporal support, the header represents a predicate with at least one time parameter that represents when the rest of the predicate is valid—the complete predicate is therefore a timestamped predicate. Rows represent timestamped propositions, and the valid time period of a row is expressed with one of two attributes: since (for semi temporal data), or during (for fully temporal data); the latter attribute is usually represented with two values, from and to.

The following shows the original and two additional timestamped versions of an exemplary Suppliers table.

Figure 7.1: Original Suppliers table and two tables with temporal support

From the original table header, you can read a predicate saying that a supplier with identification supplierid, named companyname, having contact contactname, and so on, is currently our supplier, or is currently under contract. You can pretend that this supplier is the supplier forever, from the beginning of time until...

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