I found the jooq blog (not affiliated) excellent for understanding the concepts of SQL properly. This article is a great starting point: https://blog.jooq.org

I found the jooq blog (not affiliated) excellent for understanding the concepts of SQL properly. This article is a great starting point: https://blog.jooq.org/2016/03/17/10-easy-steps-to-a-complete-understanding-of-sql/ https://blog.jooq.org/2016/03/17/10-easy-steps-to-a-complete... there are many other articles worth reading on there