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Category: Power BI

Spelunking In The SSRS REST API

Published 2017-10-16 by Kevin Feasel

Chris Webb uses Power BI to look at the new SQL Server Reporting Services 2017 REST-based API:

And the online documentation for the API is here:

https://app.swaggerhub.com/apis/microsoft-rs/SSRS/2.0

Interestingly, the new API seems to be OData compliant – which means you can browse it in Power BI/Get&Transform/Power Query and build your own reports from it. For example in Power BI Desktop I can browse the API of the SSRS instance installed on my local machine by entering the following URL:

This is something that SSRS has been missing for a long time.  I’m glad they’re introducing a real API.

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Working With CosmosDB

Published 2017-10-11 by Kevin Feasel

Derik Hammer has an introductory article showing how to work with CosmosDB to store and use document-style data:

Querying Cosmos DB is more powerful and versatile. The CreateDocumentQuery method is used to create an IQueryable<T> object, a member of System.Linq, which can output the query results. The ToList() method will output a List<T> object from the System.Collections.Generic namespace.

Derik also shows how to import the data into Power BI and visualize it.  It’s a nice article if you’ve never played with CosmosDB before.

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Power BI Conditional Formatting

Published 2017-10-11 by Kevin Feasel

Matt Allington shows us how to implement conditional formatting in Power BI:

Conditional formatting is one of the easiest ways to turn tables of boring data into a visual that almost makes the numbers jump out at you on a page.  There is nothing worse than looking at pages and pages of numbers and then trying to find insights from those numbers.  Conditional formatting helps you format your tables (and matrices) of data so that the patterns and outliers in the data are easier to spot at a glance.  Take a look at the before and after images below and see how much easier it is to see the variations in performance.

It turns out to be pretty easy, so check it out.

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Timeline Storyteller Custom Visual

Published 2017-10-04 by Kevin Feasel

Devin Knight continues his Power BI custom visuals series:

In this module you will learn how to use the Timeline Storyteller.  The Timeline Storyteller is a great way to tell a story about your data. It gives you the ability to create multiple representations of your data and then pull them together by creating multiple scenes.

This is a flashy visual and I think Devin’s set is an excellent example of where you might want to use it.

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Variables In DAX

Published 2017-10-04 by Kevin Feasel

Matt Allington shows us how to use variables in DAX:

Variables in DAX is a relatively new feature and is available in

  • Power BI Desktop
  • Excel 2016
  • SSAS Tabular 2016

Variables are not available in Excel 2013 or Excel 2010.

Click through to see how to assign and use variables.  It’s interesting to see how they’re local to a measure, so at this point at least, you can’t share variables between measures.  Given what DAX is supposed to be, that’s probably the right choice.

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Ribbon Charts

Published 2017-09-29 by Kevin Feasel

Reza Rad explains what ribbon charts are and why it’s good that they’re now available in Power BI:

Ribbon Chart shows bigger value in each column at the top, then the next value comes after. Look at the sales amount value for female and male in 2005 and 2006. In 2005, Female (Black) had more sales than Male. However, in 2006, Male (Green) generated more revenue than the female, so it is on the top for the 2006 column.

The main benefit of the ribbon chart is in this re-ordering, so it’s easier to tell which categories are largest in a specific time period.

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A Power BI Report To Track Power BI Changes

Published 2017-09-28 by Kevin Feasel

Julie Smith has found the only way to keep up with Power BI changes—using a Power BI report:

Microsoft makes major improvements via monthly and sometimes weekly releases to Power BI. In my time working on Power BI projects at Innovative Architects, I have found that the only way to stay on top of the frenetic pace of Power BI’s improvements is to closely follow its blog and other social media feeds.

This page is a Power BI report (how meta right?) built off of the content from Microsoft’s Power BI blog. I have set it up to run daily and refresh. Please let me know in the comments if you feel that the data has become stale. As part of building this report, I have added some curated slicers–things like PBI Service, PBI Desktop, Gateways, Connectors– and blogging content tags such as Contest or Webinar. Keep in mind that this is my best effort and there is no guarantee on the accuracy of my tagging. I provide this as my gift to you “as is” with no expressed or implied warranty.

Click through to see the report.

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Setting Data Types When Building Table Values In Power BI

Published 2017-09-27 by Kevin Feasel

Chris Webb shows how to use a parameter on the Table.AddColumn function in M to define specific data types:

In the last two screenshots the ABC123 icon in the column headers show that they are set to use the Any data type; the columns returned by calling the function have lost their data types.

The key to solving this problem is using the optional fourth parameter of the Table.AddColumn() function, which allows you to set a data type for the column that function adds to a table. Altering the Invoked Custom Function step of the previous query to do this, setting the new column to be a table type like so:

Worth reading in its entirety.

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An Analysis Of The Utility Of Power BI Report Server

Published 2017-09-20 by Kevin Feasel

Meagan Longoria has an after-action report of a proof of concept using Power BI Report Server:

In addition to managing to versions of Power BI Desktop, I also found myself mentally managing two sets of features. I was constantly asking myself “Can I do that in Power BI Report Server?”. Some of that is because PBI Desktop for Report Server is on a quarterly release cycle rather than monthly, so I had to remember if a feature I wanted to use was new (or in preview) and therefore not available in this version. The other part is trying to remember what you can and cannot do with a Live Connection. For example, you can make report measures, but you can’t use ad hoc grouping and binning.

We had several scenarios where users wanted to be able to group fields in multiple ways that changed somewhat frequently. Since we couldn’t use grouping and binning in Power BI Desktop to accomplish this, we set up an Excel data source in the SSAS Tabular model, and allowed users to change the groups there and refresh the Tabular model when finished. This could get rather unwieldy if you had lots of users who needed this kind of flexibility.

Ultimately, the customer considered it a success.  Read on for more details.

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