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

Using the NOW and TODAY functions


There are two functions to return the current datetime and date in the model. The TODAY function will return the current date with the time set to 12:00:00 AM. This function is useful when you need to use the current date as an input for your time calculations. The NOW function returns not only the current date, but also the exact time of when the function is executed. Depending on the time interval required, using the today function would allow you to calculate the number of sales over the last 6 or 12 hours.

How to do it...

  1. Open the Model.bim to the Calc_Date_T table.

  2. In the measure creation area, click on an empty cell to create a measure to return the current date and time:

            Current_DateTime:=NOW() 
    

  3. Now that you can see the date and time, create a new measure under the Current_DateTime measure name Current_Date to return the current date with the time set to 12:00:00 AM:

            =Current_Date:=TODAY() 
    

How it works...

In this recipe, you...