Which path to learn SQL - Data Visualization?

Which curriculum path would expose me to SQL programming - Data Visualization?

The Free Code Curriculum does not specifically teach SQL as a part of it. However, you can look through the Guide which does have several sub topics on SQL.

Would any of the paths involve connecting to a database and using database objects?

We teach you how to use MongoDB. You learn how to use Mongoose (a library which makes it easy to work with MongoDB). The curriculum challenges for MongoDB and Mongoose are located here. However, I strongly suggest you start at the beginning of the Apis And Microservices section as you will need to understand npm, Node and Express to work through the Mongo and Mongoose challenges.

Also, keep in mind that Mongo is a No-SQL database unlike MSSQL or MySQL or PostgreSQL.

That is the information I needed, thanks.