Modern web applications and APIs store valuable business records in nested JSON formats. However, handling hierarchical text structures can feel tricky for beginner analysts. When you join a power bi course in hyderabad, you learn how to unpack JSON datasets smoothly using Power Query.
Next, let us explore four step-by-step phases to transform JSON records into flat reporting tables.
1. Import JSON Files into Power Query
First, connect Power BI Desktop directly to your local JSON files or web API endpoints. Power Query imports raw JSON text as a single structured document.
Therefore, click Get Data, select the JSON file type, and launch the editor. As a result, Power Query displays your initial top-level record list instantly.
2. Convert Documents into Structured Tables
Second, transform raw JSON document objects into tabular lists. Raw JSON data must convert into standard rows and columns before you build visuals.
Because of this, click the To Table button located inside the Power Query transform ribbon. Consequently, your hierarchical document converts into a single-column table of structured records.
3. Expand Nested Columns and Record Values
Third, expand nested record fields into separate data columns. JSON files often stack multiple data fields inside single list cells.
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Expand Records: Click the double-arrow icon at the top right of your record column header.
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Select Fields: Choose specific sub-fields like customer IDs, dates, or sales amounts to display.
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Unnest Lists: Click Expand to New Rows if your JSON contains nested array lists.
4. Set Data Types and Load to Data Model
Finally, clean up your expanded columns and set correct data field types. Incorrect data types cause calculation errors when writing DAX measures later.
Therefore, change text numbers to decimals and set date fields accurately. Next, click Close & Apply to load your clean flat table into your Power BI model.
Master Power BI Today
Mastering API and JSON data transformations prepares you for real-world enterprise reporting projects. Therefore, joining a power bi course in hyderabad gives you hands-on ETL training, API integration projects, and complete career guidance.