Hello
it helps if you know how the (JSON) messages look like when ingesting them into Azure Stream Analytics.
There are a number of ways, here a few of them.
First, check the input for the sample data option:
This will give a dialog like this:
If data is received, you can save it as a file.
Or you can check the messages within the service providing the stream of data, like Azure Event Hubs:
Or check the Azure Stream Analytics Job extension for Visual Studio Code.
Here, you can test your job on your own PC.
This answer is written by myself, not by some AI. If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.