@Ashish D I think you could start by checking the custom commands feature of Azure speech services for applications that can be used with voice control. Any application that uses voice commands will need integration with other applications that can process the speech input to recognize intents and then fire the required query. With Azure and this quickstart this is possible with LUIS or the language service and the client application will eventually process the output of speech, language services to fetch your data from the database. I hope this helps clarify the scenario and build a custom voice commands with Azure services.
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