Dax blog

Now look at the following report which contains a single matrix that has been configured to look as un-matrix-like as possible but shows the same data:. Splitting a single large page into multiple smaller pages, using slicers or filters to reduce the amount of data shown at any one time and avoiding gigantic Excel-like tables are a good idea. In part this is because the cards generate four separate DAX queries against the dataset to get the data they need whereas the matrix only generates one DAX query.

There is a certain overhead to running a DAX query, so reducing the number of DAX queries needed to get the same amount of data is a good thing. More importantly, in this example Power BI can get the four values gina curl location for the single DAX query generated by the matrix much more efficiently than it can in the four separate DAX queries needed by the cards.

This is only a simple example; if you want to see a really sophisticated demonstration of replacing several visuals with a matrix I suggest you watch this video by another colleague of mine, Miguel Myers. This visual has exceeded the available resources. Try filtering to decrease the amount of data displayed.

In the case of the visual above the query behind it tried to use more than 1GB of memory and was killed by the resource governor. The limits enforced by the resource governor cannot be changed in Power BI shared capacity.

The limits are higher in a Premium capacity and vary depending on the capacity size, and if you are a Premium Capacity Admin there are a number of different settings on a capacity you can change that will affect this, described here.

For example, setting the Query Timeout setting on the capacity to 5 seconds like so:. Timeout value: 5 sec. Why is it needed?

dax blog

There is one drawback with this approach though β€” it can generate a DAX query that is too long to be executed.

Case sensitivity is one of the more confusing aspects of Power BI: while the Power Query engine is case sensitive, the main Power BI engine that means datasets, relationships, DAX etc is case insensitive. If you try the following DAX expression to create a calculated table:. The only way you can work around this case insensitivity is to make text values that would otherwise look the same to the Power BI engine somehow different.

One way of doing this would be to add some extra characters to your text. You might think adding some extra spaces would be the way to go; revisiting the first M query shown above, you could add a space to every lower case character in the table like so:. Anyway, spaces may not be visible but they still take up… well space. FromNumber function instead like so:. When you load this last M query into Power BI you see the following table:.We measure the success of companies by their ability to respond to and adapt to changing business In the era of the smart customer and a rapidly changing economic environment, organizations that are We regularly release Microsoft Dynamics for Retail empowers retailers of all sizes around the world to be dynamic In my conversations with business leaders and finance executives, many of them shared that they are On April 10, we invite you to catch a digital preview of a dynamic business solution: Microsoft One key place that technology can really make a difference is in the procurement process.

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Skip to main content. Exit focus mode. Related Articles In this article.When you are optimizing your DirectQuery model and you have done all the optimizations on the model already, you might want to run the queries generated by Power BI by your DBA. He then might be able to do some index tuning or even suggest some model changes. But how do you capture them? There are a few simple ways that I will describe here.

dax blog

Read more. Quick one today. Now this is actually not that hard, so here is the trick and a little bonus too. First I created a page I wanted it including the slicer: Now the next thing I want is that the values of the visual only show when I select a country. First thing I do is A lot has already been written on aggregations and it is one of the most exciting features of Power BI in a while.

The guys at SQLBI did a session on it and my colleague Phil Seamark wrote an amazing host of articles with many details and tips and tricks on it. So why another article? Most people think aggregations is only applicable to petabyte scale data sets. As the end of the year closes I was reminiscing on what a huge year it has been for Power BI. I work mostly with large organisations so my view will be slightly skewed towards that. For me has been the year where Power BI got massive adoption as the standard BI platform in an organisation, it went from self serve to also contain corporate BI.

Of course this is great news that we love to hear. Unfortunately that approach rarely works. I get many questions around Power BI and security related features. Recently I attended an excellent session by Andy Kirk on the state of data visualization for One of the tools Andy is most excited about is called Charticulator.

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Using a web UI you can design almost any charts by interactively specifying constraints NO code. The best news is that you can use these visuals directly in Power For those who have been with me for a while know that I have been working from home since the summer of after I moved back from Seattle to the Netherlands. I am very fortunate to be able to still work on the awesome Power BI team in a remote position.

Many of you have asked me how does this work? How can you get your work done? Skip to content.Having said that, here are the concepts, which form an integral part of all Power BI curriculaafter learning which you should have a good understanding of the most fundamental concepts in DAX. But, what if you need to analyze growth percentage across all the product categories, for all the different date ranges? Or, you need to calculate the annual growth of your company compared to market giants?

Learning DAX will help you get the most out of your charts and visualisation and solve real business problems. DAX comprises of functions, operators, and constants that can be put into the form of formulae to calculate values with the help of data already present in your model. Its library provides immense flexibility in creating measures to calculate results for just about any data analysis need.

First of all, let me explain to you how this works. Of course, there are other important concepts in here, but understanding these three will provide the best foundation on which you are going to build your skills.

L ook at this simple DAX formula. When trying to understand a DAX formula, it is often helpful to break down each of the elements into a language you think and speak every day. So, this formula includes the following syntax elements:. Total Sales is the measure name. All functions require at least one argument.

Sales is the table referenced. An argument passes a value to a function. Context is one of the most important of the 3 DAX concepts. When one speaks of context, this may refer to one of the two types; Row context and Filter context. Used predominantly whilst speaking of Measuresthe Row-Context is most easily thought of as the current row. It applies whenever a formula has a function that applies filters to identify a single row in a table. Filter-Context is a little more difficult to understand than the Row-Context.

You can most easily think of the Filter-Context as one or more filters applied in a calculation. Rather, it applies in addition to the former.

Look at the following DAX formula. This formula includes the following syntax elements:. A commaseparates the first expression argument from the filter argument. Each row in this column specifies a channel, Store, Online, etc. This is our Filter-Context. Functions are predefined, structured and ordered formulae. They perform calculations using arguments passed on to them.Submit Blog Do you want more traffic, leads, and sales?

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Michigan, United States About Blog Day Trading Forex Live was founded by the two traders, Sterling and Chad, with the aim of informing traders about the forex market and its internal workings.In this blog, I am introducing Power BI cohort analysis. This was one of the topics that I went through in detail in a Learning Summit, where I demonstrated what cohort analysis is and how you can do it in Power BI.

In this tutorial, you will learn how to set it up inside your. I worked on an entire session which encompassed many types of analysis including lost customers, steady customers and new customer analysis. All of them involved great analytical work in order to maximize the business potential of this customer data.

You can view this forum post here β€” YTD Showing. In this blog, I go over a really incredible development technique and concept on creating dynamic Power BI reports. This is actually taken from a session from a members-only event that I put on through Enterprise DNA, which was centered around financial reporting templates.

Category: DAX

In this tutorial, I want to go deeper into dynamic reporting. Continue reading. Introducing Edna 1. April 15, March 22, No comments. April 14, March 22, April 13, March 16, One comment.

April 12, March 16, Power BI. In this tutorial, you will learn how to set it up inside your Continue reading. In this tutorial, I want to go deeper into dynamic reporting Continue reading. Page 1 Page 2 … Page 55 Next. Featured posts. March 31, April 2, March 26, March 31, March 25, March 31, March 10, March 11, It is basically a language that is used to calculate or analyse existing data similar to Microsoft Excel functions.

Sure, you can analyse data as-is by using charts and other such tools, but sometimes it is necessary to carry out calculations to understand better. For example, if you have some sales data, you can easily create a month wise report for a given year. But calculating the percentage difference between each month is one simple area where DAX can be effectively used Psttt… this particular calculation is easily done using pivot tables, in Excel.

However, DAX is not limited to such simple uses, it has powerful capabilities. Read this DAX functions tutorial to get an understanding of it.

To use DAX is simple enough if you are already familiar with a few excel functions. For the purpose of this article, we will be using DAX in Power BI Desktop, a free application by Microsoft for data analysis, modeling and visualizations. We will use a simple sales data model to demonstrate. Best way to learn would be to follow along with this tutorial download practice Power BI file here. Excel file here.

This data model is made up of 3 tables β€” one is for customer details, the second is for invoices and the third one is for each list item for each invoice. Each is linked to the other by having common columns. Here is a simple diagram showing the relationships. But first, go to the Data View 2nd button to understand the dataset, to see the tables on far right of screen and their columns, so you understand what is available; it is the first step for any good analysis.

Coming back to DAX, these functions will be put in in the Data view. We will go through all of these to see how DAX functions in each. As the name may suggest, you can create new columns based on the data as needed. This will demonstrate how simple it is to get started with DAX.

dax blog

Then to add a new calculated column, go to the Modeling Tab and select New Column. A new blank column will be created and your cursor will be in the DAX editor similar to the formula bar in Excel. The calculation or, more appropriately, expression will go after the equal sign. After the equal sign, type mrp and you should see an automatic dropdown showing the table and column name like this:.

Pressing tab will type it out for you! Next, multiply by the quantity column and press enter. In the data, each row will now have the respective calculated price. Calculated columns are easy to understand and use, but take up more storage space on disk, especially if there are more than a few billion rows of data. This is because all the rows will have to be calculated every time the data is refreshed. Measures allow you to perform a calculation, without actually adding to the data.

This is very helpful for reports; where the price can be shown, without needing a whole new column to store it in. Just one major difference is that measures have to be told exactly what to calculate on.

Measures without Aggregators β€” No IntelliSense. This is indicating that such a calculation is not accepted at all. This is because in order to calculate, we need to first specify what needs to be calculated β€”.

dax blog

This difference will be easier to grasp if you try to do both these calculations on this:. Calculated columns just assumed and automatically used the second calculation. Using measures, you can calculate for each row by using:.


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