-
Just a few days before my session about Power Query at TechEd 2014, Microsoft released a new update that enables the scheduled data refresh of a Power Pivot workbook containing Power Query transformations. This is a very good news, because… Read more
-
In PowerPivot you can import data from several sources and it is often the case that you import a DateTime column from a database. From an analytical point of view, you usually make analysis over dates (day/month/year/quarter/week) and over time… Read more
-
I recently wrote a short article about filtering data in DAX. In the last month I’ve seen a growing number of people with a SQL background going to Tabular, without having a previous experience of MDX. In my opinion, learning… Read more
-
This article describes how to implement a syntax equivalent to the T-SQL function NULLIF and the ANSI SQL function COALESCE, in DAX. Read more
-
PowerPivot and Analysis Services 2012 Tabular do not support many-to-many (M2M) relationships directly in the data model. However, you can obtain the desired result from a many-to-many relationship by writing a DAX expression. For example, consider the classic M2M relationship… Read more
-
This article describes a few query limits existing in DirectQuery for both Power BI and Analysis Services Tabular 2016, explaining when you can modify them. Read more
-
To make a long story short: the ADO.NET team is now responsible of ADO.NET Entity Framework (including LINQ to Entities) and of LINQ to SQL (the last one was originally in charge of the a separated team, tied to the… Read more
-
Today at PASS Summit 2012 there have been several announcements during the keynote. Moreover, other news have not been highlighted in the keynote but are equally if not more important for the BI community. Let’s start from the big news… Read more
-
articlePower BI is a model-based tool
This article describes the differences between report-based tools and model-based tools. Because Power BI is a model-based tool and not a report-based tool, it is useful to have a quick reference guide explaining these differences. Read more
-
There are two options to model many-to-many relationships using Tabular and Power BI: you can use either a regular bidirectional filter relationship, or a limited unidirectional relationship. In this article, we compare the performance of both options. Read more