
I’ve meet my fair share of snooty people who poo poo SQL and databases as second class hand-me-downs. I still remember talking to an academic computer science grad who was explaining to me how he refused to teach database classes, he was just too good for that. Whatever. Apparently refusing to accept how 90% of companies are able to operate as data driven businesses just isn’t important to some people. There is probably nothing more important in the tool belt of a data engineer than being above average at SQL and databases. Tuning queries, writing queries, indexing, designing data warehouses. I’m sure there are some Hadoop data engineers who skipped this step of RDBMS world, but that is not the normal path of a data engineer. Let’s dive into the fundamentals of SQL and databases.
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