Book Image

Tabular Modeling with SQL Server 2016 Analysis Services Cookbook

By : Derek Wilson
Book Image

Tabular Modeling with SQL Server 2016 Analysis Services Cookbook

By: Derek Wilson

Overview of this book

SQL Server Analysis Service (SSAS) has been widely used across multiple businesses to build smart online analytical reporting solutions. It includes two different types of modeling for analysis services: Tabular and Multi Dimensional. This book covers Tabular modeling, which uses tables and relationships with a fast in-memory engine to provide state of the art compression algorithms and query performance. The book begins by quickly taking you through the concepts required to model tabular data and set up the necessary tools and services. As you learn to create tabular models using tools such as Excel and Power View, you’ll be shown various strategies to deploy your model on the server and choose a query mode (In-memory or DirectQuery) that best suits your reporting needs. You’ll also learn how to implement key and newly introduced DAX functions to create calculated columns and measures for your model data. Last but not least, you’ll be shown techniques that will help you administer and secure your BI implementation along with some widely used tips and tricks to optimize your reporting solution. By the end of this book, you’ll have gained hands-on experience with the powerful new features that have been added to Tabular models in SSAS 2016 and you’ll be able to improve user satisfaction with faster reports and analytical queries.
Table of Contents (18 chapters)
Tabular Modeling with SQL Server 2016 Analysis Services Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Testing DirectQuery mode


By running an SQL Server profiler trace, you can see exactly what is happening when a DirectQuery mode query is executed. In this recipe, you will use SQL Server Management Studio to execute a query and trace the results:

  1. Connect to your model using SQL Server Management Studio.

  2. Drag SURFACE_CONDITION, MAJOR_CAUSE, and Count_of_Crashes to the query window:

How it works...

Since the QueryMode property is set to DirectQuery, the tabular engine is accessing the data from the SQL Server Engine tables. The actual query can be seen when you use SQL Server Profiler to trace the query on the SQL Server Database. In this instance, the query results are sent back to SSAS tabular mode and then presented to the end user tool:

As you can see, the tables being queried are the base tables, and they are being accessed using T-SQL syntax not DAX or MDX.