Home | Amazing | Today | Tags | Publishers | Years | Account | Search 
Expert T-SQL Window Functions in SQL Server 2019: The Hidden Secret to Fast Analytic and Reporting Queries

Buy
Become an expert who can use window functions to solve T-SQL query problems. Replace slow cursors and self-joins with queries that are easy to write and perform better. This new edition provides expanded examples, including a chapter from the world of sports, and covers the latest performance enhancements through SQL Server 2019. 

Window functions are useful in analytics and business intelligence reporting. They came into full blossom with SQL Server 2012, yet they are not as well known and used as often as they ought to be. This group of functions is one of the most notable developments in SQL, and this book shows how every developer and DBA can benefit from their expressive power in solving day-to-day business problems. Once you begin using window functions, such as ROW_NUMBER and LAG, you will discover many ways to use them. You will approach SQL Server queries in a different way, thinking about sets of data instead of individual rows. Your queries will run faster, be easier to write, and easier to deconstruct, maintain, and enhance in the future.

Just knowing and using these functions is not enough. You also need to understand how to tune the queries. Expert T-SQL Window Functions in SQL Server clearly explains how to get the best performance. The book also covers the rare cases when older techniques are the best bet.




What You Will Learn
  • Solve complex query problems without cumbersome self-joins that run slowly and are difficult to read
  • Create sliding windows in a result set for computing such as running totals and moving averages
  • Return aggregate and detail data simultaneously from the same SELECT statement
  • Compute lag and lead and other values that access data from multiple rows in a result set
  • Understand the OVER clause syntax and how to control the window
  • Avoid framing errors that can lead to unexpected results


Who This Book Is For 


Anyone who writes T-SQL queries, including database administrators, developers, business analysts, and data scientists. Before reading this book, you should understand how to join tables, write WHERE clauses, and build aggregate queries.

(HTML tags aren't allowed.)

Take Charge of Your Workers' Compensation Claim: An A to Z Guide for Injured Employees in California
Take Charge of Your Workers' Compensation Claim: An A to Z Guide for Injured Employees in California
Orange County Register
A great hands-on guide for dealing with workers’ compensation cases.

From industrial injuries to Carpal Tunnel Syndrome, more than a million Californians a year suffer job-related injuries or illness. For many, receiving compensation can be
...
Java AWT Reference (Java Series)
Java AWT Reference (Java Series)

The Java AWT Reference provides complete reference documentation on the Abstract Window Toolkit (AWT), a large collection of classes for building graphical user interfaces in Java. With AWT, you can create windows, draw, work with images, and use components like buttons, scrollbars, and pulldown menus. The Java AWT...

Malware Detection (Advances in Information Security)
Malware Detection (Advances in Information Security)

Shared resources, such as the Internet, have created a highly interconnected cyber-infrastructure. Critical infrastructures in domains such as medical, power, telecommunications, and finance are highly dependent on information systems. These two factors have exposed our critical infrastructures to malicious attacks and accidental failures. Many...


American Cars 1946-1959: Every Model, Year by Year
American Cars 1946-1959: Every Model, Year by Year

From the resumption of automobile production at the close of World War II through the 1950s, the American auto industry would see the births and deaths of several manufacturers, great technological advances, and an era of dramatic styling as a prospering nation asserted its growing mobility. Cars of this period are among the most iconic...

Best Laid Plans: The Tyranny of Unintended Consequences and How to Avoid Them
Best Laid Plans: The Tyranny of Unintended Consequences and How to Avoid Them

Historian and author Daniel Boorstin noted, "The unintended consequences of man's enterprises have and will always be more potent, more widespread, and more influential than those he intended." Today, a Google web search for "unintended consequences" summons nearly two million pages citing the unexpected impacts of...

The Hidden Power of Illustrator CS Web Graphic Techniques
The Hidden Power of Illustrator CS Web Graphic Techniques
Adobe Illustrator has long been the industry's dominant illustration package. In this latest version, Adobe added a suite of extremely powerful, highly integrated web tools which are the focus of Steve Kurth's The Hidden Power of Illustrator CS: Web Graphic Techniques. Whether you're a Web designer making websites from scratch or a print designer...
©2019 LearnIT (support@pdfchm.net) - Privacy Policy