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Expert T-SQL Window Functions in SQL Server 2019: The Hidden Secret to Fast Analytic and Reporting Queries
Paperback
Publisher Price: $54.99
ISBN13: 9781484251966
Publisher: Apress
Published: Oct 22 2019
Pages: 213
Weight: 0.90
Height: 0.49 Width: 7.00 Depth: 10.00
Language: English
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.
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