SQL Performance Explained

Author: Markus Winand
Publisher: Markus Winand
Pages: 204
ISBN: 978-3950307825
Audience: Database developers
Rating: 4
Reviewer: Joe Celko

Covers issues of performance for all major SQL databases.

I met author Markus Winand at the 2012 PostgreSQL EU Conference, held in Prague on October 23-26, 2012, and he gave me an English copy of this book, which is also available in German. He asked me a good question about my books: why don't I ever discuss indexing or performance?

My reason is simple; I do books on ANSI/ISO Standard SQL and the Standards have never had any mention of access methods. The syntax that everyone uses is “CREATE [<index type>]INDEX <index name> ON <table name> [<product specific options>];” came from the X\Open and SQL Access consortia of vendors. Yes, the ANSI X3H2 Committee and these two groups (which later merged) had a lot of overlapping membership.


 

Click book cover for details from the book's site

 

Terminology and implementations for indexing varies from product to product. This book gives code in MySQL, Postgres, a little DB2, SQL Server and Oracle, but uses the Oracle terminology. This range of products pretty much covers every indexing option in use today.

 

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The book then proceeds to go into details that programmers my age have forgotten and younger programmers were never taught. The discussion on B-Tree indexes gives the usual description of how they work and balance. But then we get discussions on what causes slow indexes, the limitations of function based indexes, over-indexing, how to search for Ranges and not just simple equality. We look at when and why column order matters. There are a ton of common anti-patterns in DDL that mess up indexing and performance. The discussions of JOIN Operations (Nested Loops, Hash Join, Sort-Merge Join, Clustering Data, Sorting and Grouping, etc) is surprisingly detailed.

Perhaps the best material is the debunking of common myths that are spread out in the book: “Indexes Can Degenerate” , “Most Selective First”, "Oracle Cannot Index NULL” and “Dynamic SQL is Slow' are some examples. You will probably be surprised how many things you believe without being conscious of it.

This book is definitively worth having in the company library.

A pdf ebook is also available.

More Details:

http://sql-performance-explained.com/

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Query Store For SQL Server 2019

Author: Tracy Boggiano and Grant Fritchey
Publisher: Apress
Pages:219
ISBN: 978-1484250037
Print: 1484250036
Kindle: B07YNL3X4X
Audience: Users and developers of SQL Server queries
Rating: 5
Reviewer: Kay Ewbank

This book looks at the new Query Store feature in SQL Server and how you can use it to iden [ ... ]



Go Programming Language For Dummies

Author: Wei-Meng Lee
Publisher: For Dummies
Date: April 2021
Pages: 336
ISBN: 978-1119786191
Print: 1119786193
Kindle: B0921HHN48
Audience: People wanting to learn Go
Rating: 4
Reviewer: Mike James
Can a dummy master Go?


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Last Updated ( Friday, 16 November 2012 )