Hello @Purohit, Aahana , I don't think we can query two instances at once, as we see the documentation over here.
Updated: 01/07/2021: PST Redmond.
Below is the confirmation from my team on this REST API call.
Currently, we do not support batching of TSIDs in our APIs. Please note, Time Series ID can be a combination of up to 3 properties, but this is done at setup and will be a unique combination. That said be it a single or up to 3 properties, APIs support querying data one Time Series ID at a time.
Please watch the official documentation page for all future updates.
Related document to this discussion : AggregateSeries
Please leave a comment in the below section for further help in this matter.