# ask-community

Xuan Mai Ho

07/06/2023, 12:59 PM
👋 I would like to create a daily partitioned asset that covers from 2021-01-01 to the future. Historic data (from 2021-01-01) is aggregated from different upstream data sources while present day data is aggregated from other upstream data sources. What would be the best way to essentially concatenate the historic data with present data into one daily partitioned asset?
Also, please let me know if I am not thinking about the problem in the correct way! Open to other implementation strategies!

Tim Castillo

07/06/2023, 10:52 PM
Because the data comes from different sources, I feel like historical data should be its own asset, and new data is a separate asset, which is then unioned downstream when used
thank you box 1