How to link data in MySQL and MongoDB?

Question

MySQL

Hello.

A question of a theoretical nature.

Chat uses mongodb
And there is a certain system where the user is registered, + in addition, this system must periodically analyze texts and write the results of the analysis into tables.

I assume that it is enough to write the record ID from the mongi into the mySQL database.
Generally link data in different databases?

Answer 1

There is no crime in this - to store ID from another database. Of course, it is better to keep everything in one database, but I think you yourself understand this.