Common Properties between Contacts and Deals

Hi
I am looking for the common properties that available in both table, contacts and deals.
I want to join these table on some ID. 1 contact can have 2 different Deals.
Thanks in advance

Cheers!

Hi KGaur,
I think you’re looking for the Hubspot Association. From my understand, there are two ways to create association. First is from the UI. you can reference from this page: Associate records
Example:

or use the Hubspot API endpoint to create the association: