Expert T-SQL window functions in SQL Server 2019: the hidden secret to fast analytic and reporting queries
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 enhanc...
Gespeichert in:
| Beteiligte Personen: | , , |
|---|---|
| Format: | Elektronisch E-Book |
| Sprache: | Englisch |
| Veröffentlicht: |
New York
Apress
[2019]
|
| Ausgabe: | Second edition. |
| Schlagwörter: | |
| Links: | https://learning.oreilly.com/library/view/-/9781484251973/?ar |
| Zusammenfassung: | 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. You will: 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. |
| Beschreibung: | Includes index. - Online resource; title from PDF title page (SpringerLink, viewed October 29, 2019) |
| Umfang: | 1 Online-Ressource illustrations |
| ISBN: | 9781484251973 1484251970 |
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| spelling | Kellenberger, Kathi VerfasserIn aut Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries Kathi Kellenberger, Clayton Groom, Ed Pollack Second edition. New York Apress [2019] ©2019 1 Online-Ressource illustrations Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Includes index. - Online resource; title from PDF title page (SpringerLink, viewed October 29, 2019) 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. You will: 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. SQL server SQL (Computer program language) SQL (Langage de programmation) Groom, Clayton VerfasserIn aut Pollack, Ed VerfasserIn aut 9781484251966 Erscheint auch als Druck-Ausgabe 9781484251966 |
| spellingShingle | Kellenberger, Kathi Groom, Clayton Pollack, Ed Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries SQL server SQL (Computer program language) SQL (Langage de programmation) |
| title | Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries |
| title_auth | Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries |
| title_exact_search | Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries |
| title_full | Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries Kathi Kellenberger, Clayton Groom, Ed Pollack |
| title_fullStr | Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries Kathi Kellenberger, Clayton Groom, Ed Pollack |
| title_full_unstemmed | Expert T-SQL window functions in SQL Server 2019 the hidden secret to fast analytic and reporting queries Kathi Kellenberger, Clayton Groom, Ed Pollack |
| title_short | Expert T-SQL window functions in SQL Server 2019 |
| title_sort | expert t sql window functions in sql server 2019 the hidden secret to fast analytic and reporting queries |
| title_sub | the hidden secret to fast analytic and reporting queries |
| topic | SQL server SQL (Computer program language) SQL (Langage de programmation) |
| topic_facet | SQL server SQL (Computer program language) SQL (Langage de programmation) |
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