April 2017
Beginner to intermediate
512 pages
16h 24m
English
book
Tabular Modeling in Microsoft SQL Server Analysis Services, Second Edition
by Marco Russo, Alberto Ferrari
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Chapter 9. Using DirectQuery
As you saw in Chapter 1, “Introducing the tabular model,” you can deploy a tabular model using either in-memory mode (VertiPaq) or pass-through SQL queries to relational sources (DirectQuery). This chapter covers the DirectQuery storage mode. You will learn how to configure DirectQuery, what are the limitations in a data model with regard to supporting DirectQuery, and what to consider before deciding whether to adopt DirectQuery.
You can apply DirectQuery to a model that was originally defined using VertiPaq. However, this is possible only if the model does not have any of the unsupported features. Therefore, it is important to be aware of the features that would disallow a switch to DirectQuery mode if you want ...
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