Daily DAX : Day 7 TOJSON

 

Unleashing the Power of DAX: Understanding the TOJSON Function

What is TOJSON?

In Power BI's Data Analysis Expressions (DAX) language, the TOJSON function is a versatile tool that converts a table or expression into a JSON (JavaScript Object Notation) string. This string can then be used for various purposes, such as:

• Integration with external systems: Sending data to APIs or other services that accept JSON.
• Data visualization: Creating custom visualizations or modifying existing ones based on JSON data.
• Data storage: Storing data in a JSON format for later retrieval or analysis.

Syntax and Parameters

The syntax for the TOJSON function is

TOJSON(table_or_expression)

Where:

• table_or_expression: The table or expression you want to convert to JSON.

Example: Converting a Table to JSON

Let's assume we have a table named "SalesData" with the following columns:

ProductName	SalesAmount	SalesDate
Product A	1000	2023-01-01
Product B	500	2023-02-15
Product C	800	2023-03-30

To convert this table to a JSON string, we would use the following DAX formula:

SalesDataJSON = TOJSON(SalesData)

JSON

[{"ProductName":"Product A","SalesAmount":1000,"SalesDate":"2023-01-01"},

{"ProductName":"Product B","SalesAmount":500,"SalesDate":"2023-02-15"},

{"ProductName":"Product C","SalesAmount":800,"SalesDate":"2023-03-30"}]

Key Points to Remember

• TOJSON converts tables or expressions to JSON strings.
• The resulting JSON string can be used for various purposes, such as integration, visualization, and storage.
• The syntax is simple: TOJSON(table_or_expression).
• You can convert both tables and expressions to JSON.

https://dax.guide/tojson/