The creator posted this elsewhere in the comments: > it seemed like it was mostly intro stuff, or straight to DBA level This would have been perfect for someo

The creator posted this elsewhere in the comments: > it seemed like it was mostly intro stuff, or straight to DBA level This would have been perfect for someone like me a few years ago. I went into my first job knowing how to make simple queries and simple joins. I changed jobs into a legacy system where there was an overwhelming amount of data sharded across few databases and several hundred schemas. I didn't need to learn how to do simple joins or basic keywords like union and intersect that every tutorial talked about. I also didn't need a bunch of DBA knowledge like distribution strategies, replication, and HA techniques. I needed to learn how to leverage what was in the database to pull the exact data I needed more efficiently than what I was doing - windows, cursors, and good subqueries. I was the type of person being addressed.