Expert T-SQL Window Functions in SQL Server 2019: The Hidden Secret to Fast Analytic and Reporting Queries

Description

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 LearnSolve 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.

Get the book

Amazon.com

Search the book

eBay.com

Search the book

Similar books

• 

  Expert T-SQL Window Functions in SQL Server

  By Kathi Kellenberger, Clayton Groom

  You also need to understand how to tune the queries. Expert T-SQL Window Functions in SQL Server explains clearly how to get the best performance. The book also covers the rare cases when older techniques are the best bet.

• 

  T-SQL Window Functions: For data analysis and beyond

  By Itzik Ben-Gan

  Microsoft MVP Itzik Ben-Gan shows how to: • Use window functions to improve queries you previously built with predicates • Master essential SQL windowing concepts, and efficiently design window functions • Effectively utilize ...

• 

  Microsoft SQL Server 2012 High-Performance T-SQL Using Window Functions

  By Itzik Ben-Gan

  Ideal whether you’re a database administrator or developer, this practical guide demonstrates ways to use more than a dozen T-SQL querying solutions to address common business tasks.

• 

  Introducing Microsoft SQL Server 2019: Reliability, scalability, and security both on premises and in the cloud

  By Mitchell Pearson, Kellyn Gorman, Allan Hirt

  This is not really a form of encryption at disk but nevertheless is useful in certain scenarios, such as if you want to hide sections of a credit card number from support staff personnel. Traditionally, this logic would have been ...

• 

  PolyBase Revealed: Data Virtualization with SQL Server, Hadoop, Apache Spark, and Beyond

  By Kevin Feasel

  Data virtualization is a key target for Microsoft with SQL Server 2019. This book will help you keep your skills current, remain relevant, and build new business and career opportunities around Microsoft’s product direction.

• 

  T-SQL Fundamentals

  By Itzik Ben-Gan

  Itzik Ben-Gan explains key T-SQL concepts and helps you apply your knowledge with hands-on exercises. The book first introduces T-SQL’s roots and underlying logic.

• 

  Dynamic SQL: Applications, Performance, and Security in Microsoft SQL Server

  By Edward Pollack

  With a focus on new applications and modern database architecture, this edition illustrates that dynamic SQL continues to evolve and be a valuable tool for administration, performance optimization, and analytics.

• 

  T-SQL Querying

  By Adam Machanic, Dejan Sarka, Itzik Ben-Gan

  Write faster, more efficient T-SQL code: Move from procedural programming to the language of sets and logic Master an efficient top-down tuning methodology Assess algorithmic complexity to predict performance Compare data aggregation ...

• 

  Expert Performance Indexing in SQL Server 2019: Toward Faster Results and Lower Maintenance

  By Jason Strate

  The book begins with explanations of the types of indexes and how they are stored in databases. Moving deeper into the topic, and further into the book, you will look at the statistics that are accumulated both by indexes and on indexes.

• 

  Inside Microsoft SQL Server 2008: T-SQL Querying

  By Itzik Ben-Gan

  Tackle the toughest set-based querying and query tuning problems--guided by an author team with in-depth, inside knowledge of T-SQL. Deepen your understanding of architecture and internals--and gain practical approaches and...