Resource links: Spark SQL
https://www.edureka.co/blog/spark-sql-tutorial/
^spark sql basics; currently has an annoying popup
https://www.projectpro.io/article/spark-sql-for-relational-big-data-processing/355
^spark sql in the broader context of big data
https://data-flair.training/blogs/spark-sql-tutorial/
^beginners guide; part of a broader range of spark tutorials
https://spark.apache.org/docs/2.3.0/sql-programming-guide.html
^official source! has a lot of info about dataframes, datasets, and data sources
https://www.tutorialspoint.com/spark_sql/spark_sql_dataframes.htm
^specifically about dataframes
https://blog.taboola.com/spark-sql-score/
^this is about Schema on Read
https://medium.com/@subashsivaji/types-of-apache-spark-tables-and-views-f468e2e53af2
^ tables and views