https://www.linkedin.com/learning/search?keywords=non%20relational%20databases&u=78588490

https://www.linkedin.com/learning/search?keywords=non%20relational%20databases&u=78588490 (Why Relational Databases)

https://support.office.com/en-us/article/guide-to-table-relationships-30446197-4fbe-457b-b992-2f6fb812b58f (Guide to Table Relationships)

https://www.linkedin.com/learning/search?keywords=non%20relational%20databases&u=78588490 (normal forms)

https://www.linkedin.com/learning/search?keywords=graph%20database&u=78588490 (very simple graph database discussion)

https://www.upwork.com/hiring/data/sql-vs-nosql-databases-whats-the-difference/ 

https://www.linkedin.com/learning/topics/neo4j?u=78588490 (neo4j search(

https://youtu.be/yOYodfN84N4 (video on graph databases: watch up to 38:14)