SQL Server Reference Guide
by Buck Woody
Publisher: Pearson Education 2013
Database professional Buck Woody leads you through the many aspects of designing, administering, and developing for your SQL Server platform. Recommended for DBAs and developers alike, this Reference Guide covers SQL Server 2000 up to SQL Server 2008 R2.
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by Ross Mistry, Stacia Misner - Microsoft Press
The authors explain how SQL Server 2014 incorporates in-memory technology to boost performance in online transactional processing and data-warehouse solutions. They also describe how it eases the transition from on-premises solutions to the cloud.
by Holger Schmeling - Simple-Talk Publishing
Reading Holger's booklet is a great way of brushing up on the subject of Statistics and query-optimization. It is reasonably short, and geared to the practitioner rather than the theoretician. It is careful to stick with the things you need to know.
by Benjamin Nevarez - Red gate books
A better understanding of what the Query Optimizer does behind the scenes can help you to improve the performance of your databases and applications, and this book explains the core concepts behind how the SQL Server Query Optimizer works.
by Grant Fritchey - Redgate Publishing
An execution plan describes what's going on behind the scenes when SQL Server executes a query. This book leads you right from the basics of capturing plans, through how to interrupt them, and how to diagnose the causes of poor query performance.