Left outer join equivalent.Fetch data from two collections without adding relationships to the collections with a common field?

[Joel_Fernandes]

I want to fetch data from two collections using a single graphQL without adding a relationship between the collections.

I want to know a Left out join equivalent for GraphQL. I have done a ton of research cannot get a good simple solution.

I have asked a similar question here https://www.mongodb.com/community/forums/t/graphql-equivalent-join-query-amoung-collections/158512/4… Any help would be helpful… Thanks in advance.