While working with Power BI we often need to convert Seconds to Duration. This is easily done in Excel just by applying the formatting code “HH:MM:SS”. Unfortunately in Power Query or DAX, this is not possible. Here is the solution:
A brilliant new feature is now available in Power BI – Split column into rows. To understand why we need it, you must go and read the article – Analyzing badly captured Survey data or feedback forms. This method used Power Query concepts of Split and Unpivot. Now these have been combined into a single, intelligent command called Split columns into rows. It sounds confusing at first. But soon you will realize that it is an amazing tool. Learn it just 4 minutes.
Raw data looks like this
And you get a report like this. No need to use formulas or do any manual work.
You must have the May 2017 update for Power BI Desktop installed.
Here is a quick post to show the practical scenario when the Remove Top and Bottom Rows options are useful while cleaning up data using Power Query.
Remove Top Rows
Often we get CSV files which have tabular data. Sometimes, there is a title, blank rows and some other related but unwanted data just above the useful tabular data. In such cases, we use the Remove Top Rows option.
Remove Bottom Rows
If you get data from web pages (HTLM tables), the header row is repeated at the bottom. This option helps you remove the unwanted row.
Another common issue is that many reports dump data with a grand total at the bottom. Remove Bottom Rows option is also usefu in these cases.
It is quite possible that we focus on the top few rows while cleaning up data. It is equally important to import the data and look at the bottom rows. The bottom part of the data can have many issues which often go unnoticed and may even generate inaccurate results.
Here is another short but power packed video which explains how analytics can drive growth. Read the related articles here.
Often we get data which is distributed in multiple column sets. Here is how you can convert it to good data (tabular column format) using Power Query. Watch the video. Sample File download.
This is a simple check sheet. Usually done on paper. But with ubiquitous tablets being available, it can be done on Excel as well.
Photo credit: The U.S. Army / Foter / CC BY
This is the worst type of input data to get. Each row has been split into two (or sometimes more) rows. We want those to be combined into a single row. In an earlier article, I have shown one method of doing this.
Now here is a simpler, faster and more powerful method using Power Query.
(Estimated reading time 12 min)
Presentation download with reference links
Download the Presentation (3 MB). I have added lots of links to related articles and external references including books written by stalwarts in Excel analytics field.
Thank you for the overwhelming response for Data Analytics webinar video. More than 800 attendees, 70+ questions.
Watch the video on YouTube (use 720P) or Download (MP4, 188 mb, 60 min) and view on your PC. A big thank you to the Microsoft and Economic Times team for making this possible.
Power Query is an amazing tool for importing and cleaning up data from various sources. The problem was that it required you to have professional version of Office. Now that problem is solved…