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Expert T-SQL Window Functions in SQL Server
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Expert T-SQL Window Functions in SQL Server
BOOK DETAIL
Paperback: 152 pages Publisher: Apress; 1 edition (March 21, 2015) Language: English ISBN-10:
9781484211045 ISBN-13: 978-1484211045 ASIN: 1484211049 Product Dimensions: 6.1 x 0.4 x 9.2 inches
Shipping Weight: 10.6 ounces (View shipping rates and policies)
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Book Description
Expert T-SQL Window Functions in SQL Server takes you from any level of knowledge of
windowing functions and turns you into an expert who can use these powerful functions to solve
many T-SQL queries. Replace slow cursors and self-joins with queries that are easy to write and
fantastically better performing, all through the magic of window functions. First introduced in
SQL Server 2005, window functions came into full blossom with SQL Server 2012. They truly
are one of the most notable developments in SQL in a decade, and every developer and DBA can
benefit from their expressive power in solving day-to-day business problems. Begin using
windowing functions like ROW_NUMBER and LAG, and you will discover more ways to use
them every day. You will approach SQL Server queries in a different way, thinking about sets of
data instead of individual rows. Your queries will run faster, they will be easier to write, and they
will be easier to deconstruct and 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 explains clearly how to get the best performance. The book
also covers the rare cases when older techniques are the best bet. Stop using cursors and self-joins
to solve complicated queries. Become a T-SQL expert by mastering windowing
functions.Teaches you how to use all the window functions introduced in 2005 and 2012.Provides
real-world examples that you can experiment with in your own database. Explains how to get the
best performance when using windowing functions. What you’ll learnCreate aggregations by
defining sets of rows with the OVER clause.Calculate aggregates without losing the details.Rank
and bucketize data for reporting purposes.Reduce and often eliminate self-joins. Reduce and often
eliminate row-by-row cursor processing.Write simpler queries that perform with greater
speed.Recognize situations when window functions make a difference.Who this book is for
Expert T-SQL Window Functions in SQL Server is for the SQL Server database professionals
who are ready to take on the biggest leap in query-writing expressiveness and performance to hit
the SQL language in years. It’s for developers and database administrators who may have heard
about windowing functions, but who haven’t had a chance to learn much about them. Expert T-
SQL Window Functions in SQL Server is an excellent way for database professionals to get up to
speed on these functions and put their benefits to work. Table of Contents 1. Looking through the
Window 2. Discovering Ranking Functions 3. Aggregating with Window Functions 4. Tuning for
Better Performance 5. Calculating Rolling and Running Aggregates 6. Adding Frames to the
Window 7. Peaking at Other Rows 8. Understanding Statistical Functions 9. The Future of
Window Functions

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