Asking Questions With Power BI

Reza Rad shows us how to interrogate Power BI:

When you published your Power BI file into the Power BI desktop, usually you create a dashboard for it. For Power Q&A to work (the version of Power Q&A at the time of writing this post) you should create a dashboard for your report. After creating the dashboard you will see the question bar of Q&A on the top of your dashboard.

My preferred technique is good developer, bad developer.

Custom Power BI Visuals

Reza Rad shows us how to create a custom visualization in Power BI:

This is one of the coolest custom visuals I’ve seen so far. The reason is that this custom visual has a customization in it! with this visualization you can define regions in any picture or images, and map data points to the image in your Power BI report. The image can be everything; human body, airplane seat layout, shop floor layout or football field. You choose the image you want, then you define regions. Let’s have a closer look at this visual.

It’s amazing how easy Power BI makes that.  Almost easy enough for me to do it…

Movie Analysis Using Power BI

Dan English compares Marvel versus DC movies using Power BI:

This is an interactive report comparing the results of Marvel versus DC movie information with regards to the number of movies, adjusted worldwide gross box office earnings, and includes IMDb ratings. You can get a feel for the shift from the 1960’s through the 1990’s as DC dominated the market and then Marvel stepped in and has dominated the box office since.

This is a fun data set and dashboard.

Power BI Roundup

Jorge Segarra has a roundup of this month’s T-SQL Tuesday:

This month I challenged the blogging community to share their own creations in Power BI. We got a ton of great entries this month, thank you everyone who participated! My overarching goal for this month’s topic was to get folks who may not normally play in the BI space to use this fantastic solution and maybe get some ideas flowing on how they may be able to apply it in their everyday work.

The part I like most about T-SQL Tuesday is that it introduces you to a whole new set of bloggers and a whole new set of perspectives on any particular topic.

Power Pivot And Power BI Data Modeling

Avi Singh has a post on data modeling in Power Pivot and Power BI:

It was Greg, who suggested that we form a book reading club. Our first book was one I had heard about, but never read – The Data Warehouse Toolkit: The Definitive Guide to Dimensional Modeling By Ralph Kimball. As a business analyst, I had leaned heavily on Excel, along with a mishmash of other technologies. Data warehouse and data modeling didn’t seem like topics that would be relevant to me; more for an IT/BI team perhaps. But I figured, it couldn’t hurt to learn something new.

Our book club meetings looked more as if, class was in session. We brought in our questions, and Greg patiently answered them, helping us realize the importance of the topics, and trade-offs involved in various choices. As things go, our reading club was disbanded before we were even halfway through the book. But the knowledge that I had gained, helped me grow by leaps and bounds in my Power Pivot and Power BI journey.

Kimball-style fact-dimensional modeling remains a brilliant solution.

Getting Into Power BI

Jorge Segarra jumps into Power BI:

For my contribution to this contest I’ve decided to share with you a work in progress. If you know me, I’m a huge lover of Policy-Based Management. In fact, I’m actually part of the Enterprise Policy Management Framework (EPMF) project on Codeplex. T-SQL Tuesday event is normally a DBA-centric event so I figured I’d help the DBA crowd wrap their heads around how a BI solution can help them in their day to day.

What I did to kick start this effort was to create this Power BI report that allows you to explore the database repository that contains the EPMF policy evaluation results. The current EPMF project uses Reporting Services to deliver its reports. This won’t change. If anything I’ll be exploring new capabilities with SQL Server 2016 and R-integration. Here’s a screenshot of what the SSRS dashboard report looks like:

I like this post because most Power BI examples tend to be personal (Fitbit stats, etc.) or business-y.  This is a good example of a use of Power BI for back-office database administrators.

Power BI With SSAS

Jens Vestergaard’s T-SQL Tuesday entry involves Power BI feeding from Analysis Services:

My story with this half-baked product (the Dashboard you are about to see), is that I needed some way of tracking performance on a couple of Analysis Services (SSAS) query servers. There are a lot of good posts and talks about how to collect and store performance counters and SSAS logs out there, and I suggest you look into this, this or that, if you need inspiration.

The current data set is about 200K rows, as I am sampling each server every 5th minute.

Both of these are valuable tools in a Microsoft BI environment.

CSVs With Line Breaks In Power BI

Chris Webb talks about one of the banes of my existence:  flat files with “rogue” line breaks:

But what if you can’t fix the source data? I was asked this question the other week, and since I had been asked about it before and not come up with a good answer, I decided to spend some time researching the problem.

What I found was that it was relatively easy to write some M code that gave me the correct results, but very hard to write code that performed acceptably well on a large data set (I was testing on a CSV file containing almost half a million rows). Here’s the code for the function I ended up with:

It’s nice to see that Power Query & Power BI have methods to get around this sort of issue, but it sounds like even those methods are limited in value.

Power BI Plus Fitbit

Rob Farley visualizes his Fitbit data with Power BI:

I added a column: RollinAvgSteps = AVERAGEX(FILTER(fitbit_export_20160214, EARLIER(fitbit_export_20160214[Date])>=fitbit_export_20160214[Date]),fitbit_export_20160214[Steps])

…which takes the average of my steps to date. There are a bunch of ways to achieve this, but this is the way that I chose. And you can see that the average line is (happily) improving! Oh, and because I pulled down the extract on the 14th, there’s a dip at the end. My numbers were much healthier by the end of the day, and despite spending way too long NOT walking, I did about 7244 steps that day.

You can see the result at http://bit.ly/RobFitbit

I like the rolling average that Rob added in.

Shot Charts

Jason Thomas shows us how to create an NBA-style shot chart using Power BI:

My entry is an analysis of the first 35 games played by Stephen Curry from the Golden State Warriors in NBA. The main feature of the entry is a Shot chart which shows the position from which he attempted his shots and the color denotes whether he made or missed it.

Jason also asks you to vote on his contest entry if you think it’s good.

Categories

April 2017
MTWTFSS
« Mar  
 12
3456789
10111213141516
17181920212223
24252627282930