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SQL Server 2017 Developer???s Guide

You're reading from   SQL Server 2017 Developer???s Guide A professional guide to designing and developing enterprise database applications

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Product type Paperback
Published in Mar 2018
Publisher Packt
ISBN-13 9781788476195
Length 816 pages
Edition 1st Edition
Languages
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Authors (3):
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Dejan Sarka Dejan Sarka
Author Profile Icon Dejan Sarka
Dejan Sarka
Miloš Radivojević Miloš Radivojević
Author Profile Icon Miloš Radivojević
Miloš Radivojević
William Durkin William Durkin
Author Profile Icon William Durkin
William Durkin
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Toc

Table of Contents (19) Chapters Close

Preface 1. Introduction to SQL Server 2017 FREE CHAPTER 2. Review of SQL Server Features for Developers 3. SQL Server Tools 4. Transact-SQL and Database Engine Enhancements 5. JSON Support in SQL Server 6. Stretch Database 7. Temporal Tables 8. Tightening Security 9. Query Store 10. Columnstore Indexes 11. Introducing SQL Server In-Memory OLTP 12. In-Memory OLTP Improvements in SQL Server 2017 13. Supporting R in SQL Server 14. Data Exploration and Predictive Modeling with R 15. Introducing Python 16. Graph Database 17. Containers and SQL on Linux 18. Other Books You May Enjoy

Enhanced DML and DDL statements

In this section, you will explore enhancements in Data Manipulation Language (DML) and Data Definition Language (DDL) that are not part of new features or improved features from previous SQL Server versions.

The section starts with a small syntax extension that you will use often in the code examples in this book.

The conditional DROP statement (DROP IF EXISTS)

With a conditional DROP statement, you can avoid getting an exception if the object you want to drop does not exist. If, for instance, the T1 table has already been removed or it was not created at all, the following statement will fail:

DROP TABLE dbo.T1; 

Here is the error message:

Msg 3701, Level 11, State 5, Line 5
Cannot drop the...
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