Your database doesn’t just contain your data. It also contains data about your data.
This week I got to thinking, a ballet class is a good way to describe database concepts.
This post covers the SQL concepts that pop up during training. If you need a refresher or have a junior analyst in your life who needs a resource to refer to, keep reading.
Everything you need to get started with SQL and becoming a great data analyst.
Your query is running slow, have you checked your indexes?
Joining tables is the first big learning curve after getting your head around SQL basics.