Hi. We are trying to migrate to Azure our app which shows data from multiple IoT devices arranged in SQL tables. From what we read we believe the trick will be done with IoT Hub + Stream Analitics + SQL Az database +Az Web App. We hava many grey areas as to how to implement this, specially the stream input to the Stream Analytics. How to dicern between the different devices which sent the corresponding messages. Could you give us a starting point for this? Which specific azure doc should I read?