What is a Query – Troubleinthepeace


After 7 years of development, Power Query really gives users many outstanding features. However, up to now, many Excel users in Vietnam still can’t figure it out What is Power Query?. In the past, people who were supposed to be Excel experts would use VBA tools to automate data, as simple as copying and pasting data from multiple sources. But not everyone has the ability to code – this VBA programming language. So the solution of modern Excel is to use Power Query.

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What is Power Query?

In a nutshell, Power Query is a collection of features, dedicated to the purpose of fully automated data processing. Aimed at users who are not able to use the programming language. In fact, this is a feature that needs to be added-in (extension) from within Excel 2010 versions. However, from Excel 2016, Power Query has been shown in the Data section.

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What is power query?

Applications of Power Query in Excel

Power Query in data automation

Using this tool on Excel will help you automate data quickly. I can give an example for you to imagine as follows:

Example: Employee A has to download 10 data files from the system every day. This employee’s job is to copy these 10 files and put them in 10 different sheets of another Excel file, then write the formulas for the sales of the previous day. Work performed on a daily basis. If employee A does not know how to use the Power Query tool, you must do this operation for an average of 20 minutes per day. However, connecting to data and refreshing data using Power Query, this operation only runs less than 1 minute.

In addition to the example above, Power Query has many other applications in data automation. Please refer to foundation course ours.

Applications in data cleaning

When we receive data files from others, we do not always have a standard data to work with. Therefore, data normalization is a must and prerequisite before processing.

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The following figure will describe to the reader how a data table is structured correctly and incorrectly

What is power query?

Therefore, usually when receiving unstructured data, it will take a long time to process. However, with the application of Power Query tool in data cleaning, it will save you a lot of time. For the above data case, you just need to use the feature Unpivot It is possible to get the correct table structure within 1 click. In particular, Power Query still retains the original original data, even though the user has changed the format and formula inside.

Using Power Query in data analysis

By manipulating and using the very simple M Query or drag and drop language, users can write Excel formulas or combine data from multiple sources. The loaded results will not include intermediate formulas, helping to reduce the size of the data file. At the same time present necessary information for the reader.

Besides, Power Query is an effective tool for data analysts – Business Intelligence in analyzing multi-source data. By combining with Power BI, it will help users simulate results through charts and tables automatically.

How to self-study Power Query?

With its user-friendly design, Power Query is a great tool for people who often have to work on Excel. Using this tool is very simple, with only data connection, transformation, or combining and finally sharing of data. Therefore, users can self-study with guidance from Basic Power Query course us to automate 80% of the day-to-day tasks that you do manually every day, and learn more about Power Query’s other outstanding features. Besides, you can refer to the article shared between studying Power Query and VBA, I believe the popularity and application of Power Query in work is much more widespread and simple.

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Nguyen Minh Nhat, CMA

With the desire to share the most complete and up-to-date knowledge of data and analysis with everyone, I have spent all my time from the time I graduated from college until now to continuously do in-depth research, experience many things. positions that directly harness value from data at companies across a variety of sectors to deliver a COMPREHENSIVE ANALYSIS program that blends foundational theory and applied practice. I and the team at UNIACE hope this program will inspire people about the profession, especially the next young generations, to balance the shortage of analytical human resources in Vietnam.

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