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.)

Basic Electrical Installation Work, Fifth Edition: Level 2 City & Guilds 2330 Technical Certificate
Basic Electrical Installation Work, Fifth Edition: Level 2 City & Guilds 2330 Technical Certificate

"A must read book for beginners, DIYers & electricians alike" (Amazon.co.uk customer review of the previous edition, Sep 2006)

Covers all electrical installation trainees need to know for the Level 2 certificate

Trevor Linsley's textbooks have helped thousands of students to
...

Writing Stored Procedures with Microsoft SQL Server: The Authoritative Solution
Writing Stored Procedures with Microsoft SQL Server: The Authoritative Solution
This book was written so that you can learn how to create stored procedures. I'm
sure that you have created a few stored procedures already. The first stored
procedures I created were simple queries that I encapsulated so that I didn't have to
reload or retype them every time I wanted to run them. After a while, I learned how...
Electronic and Electrical Servicing, Second Edition: Consumer and Commercial Electronics
Electronic and Electrical Servicing, Second Edition: Consumer and Commercial Electronics
The key to success in City & Guilds courses in electronic and electrical servicing

Electronic and Electrical Servicing provides a thorough grounding in the electronics and electrical principles required by service engineers servicing home entertainment equipment such as TVs, CD and DVD machines, as
...

Beginning SQL Server 2008 for Developers: From Novice to Professional
Beginning SQL Server 2008 for Developers: From Novice to Professional
SQL Server 2008 is a first–rate database management system. It offers more capability than any previous release of SQL Server. More than just a classic relational database management system, SQL Server 2008 includes exciting and powerful features that make it useful for everything from large corporate data warehouses to ad hoc departmental...
The Birth of Satan: Tracing the Devil's Biblical Roots
The Birth of Satan: Tracing the Devil's Biblical Roots
"An informative study of the biblical origins of Satan…With resourceful though never excessive citation, Mobley and Wray make a good job of pinning down the roots of a notoriously protean character."--The Times Literary Supplement

"Let's admit it. Even in a secular age we are all still
...
Microsoft SQL Server 2012 High-Performance T-SQL Using Window Functions
Microsoft SQL Server 2012 High-Performance T-SQL Using Window Functions
Window functions, to me, are the most profound feature supported by both standard SQL and Microsoft SQL Server’s dialect—T-SQL. They allow you to perform calculations against sets of rows in a flexible, clear, and efficient manner. The design of window functions is ingenious, overcoming a number of...
©2020 LearnIT (support@pdfchm.net) - Privacy Policy