Mastering DAX + Optimizing in Toronto - Sept 19-23, 2016   Mastering DAX Video Course

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ARTICLE

Physical and Virtual Relationships in DAX

DAX calculations can leverage relationships present in the data model, but you can obtain the same result without physical relationships, applying equivalent filters using specific DAX patterns. This article show a more efficient technique to apply virtual relationships in DAX expressions.

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Optimizing DAX expressions involving multiple measures

Measures summed

Writing measures referencing other measures is in general a good idea that simplifies the DAX code, but you might face specific bottlenecks. This article describes which performance issues might arise when different measures aggregate the same column using different filter arguments, and how to improve efficiency of your DAX code.

ARTICLE

Many-to-many relationships in Power BI and Excel 2016

The new DAX available in Excel 2016 and the data model in Power BI and Analysis Services 2016 offer tools to manage many-to-many relationships in a more efficient way than previous version, as described in this article.

ARTICLE

Choosing Numeric Data Types in DAX

A data model for DAX has three numeric data types: integer, floating point, and fixed decimal number. This article describes them and explains why the fixed decimal number should be used instead of the floating point in most scenarios.

ARTICLE

Data Import Best Practices in Power BI

When you create a data model in Power BI, you should consider how to properly use naming convention and what columns to include, in order to improve usability and performance. This article provides a quick list of best practices valid for both Power BI and Power Pivot.

ARTICLE

Nested grouping using GROUPBY vs SUMMARIZE

GroupBy_Summarize_01

DAX introduced a GROUPBY function that should replace SUMMARIZE in some scenarios. This article describes how to use GROUPBY in nested grouping scenarios and other improvements.

ARTICLE

Create Static Tables in DAX Using the DATATABLE Function

DATATABLE_PastePowerPivot

You can create static tables in DAX using the DATATABLE function. This article describes the syntax of this new feature and shows when and how to use it.

TOOL

Power Pivot Utilities

Power Pivot Utilities in an Excel add-in (based on a collection of VBA macros) that helps documenting PowerPivot models and facilitates the creation of pivot tables connected to the data model.

ARTICLE

Apply AND Logic to Multiple Selection in DAX Slicer

Multiple Selection - initial

When you apply a multiple selection to a slicer or to a filter, you obtain a logical OR condition between selected items. This article shows how to implement a logical AND condition in a measure instead of the standard OR one.

ARTICLE

Calculated Columns and Measures in DAX

ColumnsMeasures-02

One of the first concepts to learn in DAX is the difference between calculated columns and measures. This article shortly recap the differences and describes when to use each one.