Power Query JSON connector: 3 Easy Methods

Extracting meaningful insights from the millions of rows of data collected in real-time is always a huge challenge for organizations globally. Data Visualisations Tools like Power BI allow business teams to build visually stunning and informative dashboards & reports to keep a tab on their goals & objectives. Power BI provides a collection of features that simplifies the decision-making process.

One of the important sources of data today is the web. JSON is a common format in which the data is read from the data server and displayed on a web page. You can easily set up the Power BI JSON connection and start building your reports.

In this article, you will learn how to effectively set up the Power BI JSON connection using 3 different methods.

Methods to Establish Power BI JSON Connection

You can set up the Power BI JSON Connection using the following methods: 

• Power BI JSON Connection Method 1: Load a Local JSON File from the Power BI Desktop
• Power BI JSON Connection Method 2: Importing JSON data with Power BI Rest API Calls
• Power BI JSON Connection Method 3: Load a Local JSON File from Power Query Online  

Power BI JSON Connection Method 1: Load a Local JSON File from Power BI Desktop

In this Power BI JSON Connection example, a sample JSON file is used that is sourced from the NASDAQ stock exchange. To download this file, you can visit the NASDAQ’s On-Demand Data page. This sample file contains NASDAQ stocks-related data in attribute-value pairs. The red box highlights some of these attributes and values such as StartTime of 06/15/2011 09:29:05.698 or an AskQuantity of 100.

Follow the simple instructions given below to set up the Power BI JSON connection:

• Step 1: Start the Get Data Wizard
• Step 2: Select the Data Source and Desired JSON File
• Step 3: Link and Transform the File using Power BI Query Editor
• Step 4: Drilldown to Records and Convert Rows
• Step 5: Split into Columns
• Step 6: Create Visualization

Step 1: Start the Get Data Wizard

• To connect Power BI JSON locally, open up Power BI Desktop. To import your local JSON file to Power BI, you need to start the Get Data Wizard. You can do that in 2 ways:
  • Click on the Get Data Splash screen option.

• Click on the Get Data tab from the top menu and then click on the More… option.

Step 2: Select the Data Source and Desired JSON File

• Step 1: Now, a Get Data dialog box will pop up on your screen. Select JSON as your data source and click on the Connect button.

• Step 2: Browse to the location where you have saved your JSON Data file and select it. Click on the Open button to start your Power BI JSON connection.

• Step 3:  You also import JSON files directly from the web by entering the required URL.

Step 3: Link and Transform the File using Power BI Query Editor

Starting the Power BI Connection will automatically launch the Power BI Query Editor. You will notice a Record is stated under the List column. Often, Power BI recognizes a set of Record links in the initial stage when you import the JSON Data. By clicking on these records, you can drill down further into the JSON file structure.

Step 4: Drilldown to Records and Convert Rows

• Step 1: Click on the Record link and notice that Power BI will present you with the highest level of details within the JSON file. 

• Step 2: Among various details such as Start Time, End Time, etc, observe that the Quotes row has a hyperlinked “Links” option. Hover over it, and you will notice a list of records. Finally, click on this option to view the records.
• Step 3: Now, you can convert this list of records into the rows of a table. Click on the To Table option present in the top left corner. 

• Step 4: You can specify the delimiters used in your data and how Power BI should handle the extra columns. Click on the OK button once you are done.

Step 5: Split into Columns

• Step 1: Once you have converted your records, a single column will appear. Click on the Split Columns button present on the column header.

• Step 2: A list of possible columns is displayed. Select the columns according to your use case and click on the OK button. To set the current column as the prefix, check the box next to the “Use original column name as prefix” option.

• Step 3: A table containing the desired columns will appear. You can also see the list of steps you applied to get to this stage on the Applied Steps feature present on the right-side vertical menu. By clicking on the X option you can also undo the steps you don’t like and again set up your table.

• Step 4: Finally, click on the Close & Apply option available on the top left corner of your screen. This will return your data to the main Data Visualisation Window.

Step 6: Create Visualization

After setting up your Power BI JSON connection, you will now land upon the Reports View. Using various Filters, Charts & Graphs, and Value Fields you can create visually stunning reports based on your JSON data.

Power BI JSON Connection Method 2: Importing JSON data with Power BI Rest API Calls

You can also set up a Power BI JSON Connection using the RESTful API Calls. You can easily extract data from Websites that allow Restful APIs for data access and use that data in several formats, such as JSON and CSV. For this Power BI JSON Connection example, data about the eight different houses from the TV Show Game of Thrones is extracted from the Anapioficeandfire Website. 

• Step 1: Click on the above link and you will observe the following in your browser window.

This website provides an API to access a collection of books, characters, and houses from the novel series: A Song Of Ice And Fire.

• Step 2: Go to Power BI Desktop and click on the Get Data option present on the top ribbon. Click on the More… option. 
• Step 3: Type “Web” in the search box and select web as your data source. Click on the Connect button to start your Power BI JSON connection.

• Step 4: A From Web dialogue box will appear on your screen. Enter the URL https://anapioficeandfire.com/api/ as the first part and “houses/” as the second part. The URL preview should be https://anapioficeandfire.com/api/houses/. Once done, click on the OK button.

• Step 5: This will automatically open up the Power Bi Query Editor containing the data set in the form of a JSON file having 10 records. Each of these records describes one of the houses in the novel series. Similar to locally setting the Power BI JSON connection, click on the To Table option present on the top left corner.

• Step 6: Click on the “<->” symbol present alongside the Column Name to split the columns.

• Step 7: Select the column you desire to be placed in the table and click on the OK button.

• Step 8: After expanding the columns, notice that the “titles” and “seats” columns still need to be expanded further. To do that, click on the “<->” button at the top right of the column name as shown below:

After expanding both the “title” and the “seats” column, your table should look like this:

You can also observe several duplicate records appear when you expand the “title” and “seats” columns. This is possible as one house can have multiple titles and seats. 

• Step 9: Click on the “Close & Apply” button available on the top left corner to open this dataset in the Query window.
• Step 10: After the Power BI JSON connection is set up, you can now start creating visualizations. In this Power BI JSON connection example, a simple pie chart displaying the distribution of ancestral weapons by region is created. To do this, click on the “pie” chart option from visualizations. Now, in the “Legend” field, add “region” and in the values field, add “Count of ancestral Weapons”.

The following pie chart shows that almost 50% of the ancestral weapons belong to the region “The Vale”. Similarly, 11.1% of weapons belong to each of the “The Reach” and “The North” regions.

This completes the Power BI JSON connection via the REST API calls.

Power BI JSON Connection Method 3: Load a Local JSON File from Power Query Online  

Apart from the Power BI Desktop version, you can also import the Local JSON file using the Power Query Online version. You can easily set up the Power BI JSON connection via Power BI Online by following the simple steps given below:

• Step 1: Go to the Data Sources page and select JSON.
• Step 2: In the Connection Settings, enter the location of the local JSON file stored on your computer.

• Step 3: From Data Gateway, choose your on-premise data gateway.
• Step 4: Enter your credentials when asked for authorization and click the Next button. This will launch the Power Query Editor automatically. You can now follow the steps discussed in the above two methods to set up your table and create the desired visualizations.  

Why Connect Power BI to JSON?

Power BI allows you to work with a broader range of datasets in various formats such as Excel, CSV, JSON, etc. JSON has become a popular data format as it is supported by most browsers and backend technologies. Its easy creation and manipulation allow JSON to gain JSON momentum in the programming of API code and web services. Hence, you may find yourself extracting JSON data from the web for your business analysis. Similar to XML, JSON is self-describing and uses a tagging method “to tell” about the data. However, it is focused on providing a flexible yet organized method of exchanging data. 

How to Troubleshoot Power BI JSON Connections?

While working with the Power BI JSON connection, you may get the following error message if the file is invalid. It could happen if it’s not really a JSON file, or is malformed. Another case might be that you are trying to load a JSON Lines file.

For cases when you are loading a JSON Lines file, the following sample M code converts all JSON Lines input to a single flattened table automatically:

let
    // Read the file into a list of lines
    Source = Table.FromColumns({Lines.FromBinary(File.Contents("C:json-lines-example.json"), null, null)}),
    // Transform each line using Json.Document
    #"Transformed Column" = Table.TransformColumns(Source, {"Column1", Json.Document})
in
    #"Transformed Column"

Note that you will be required to use an Expand operation to combine the lines together.

Conclusion

In this article, you have learned how to effectively set up the Power BI JSON connection using 3 different methods. Power BI allows you to work with data in several formats such as CSV, Excel, and JSON. JSON is a common format when extracting data from the web. Both Power BI Desktop & Power BI Query Online supports the Power BI JSON connection. Besides importing your locally stored JSON files, Power BI also allows you to extract data from the web via RESTful API calls. 

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