What Should I Know About This Dive?

Congrats! You are thinking about pursuing (or continuing your pursuit of) SQL! Awesome you!
We live in a data driven world. Almost all software applications use databases, and SQL is the language we use to manipulate one type of database: the relational database. 
At its most basic, a database is simply  a collection of data. Within each database are methods to create, access, and manipulate the data. Database Management Systems (DBMS) are used to interact with these databases. The most commonly used relational DBMS’s in computer science are SQLite, Postgres, MySQL Server and Oracle . The DBMS uses SQL(Structured Query Language) to query databases and find the information you need.
So in answer to your question, the answer is yes, Yes, YES! Learn SQL already!  
If you're ready to move forward with SQL, we are proud to share with you this completely free online compendium of resources to help you get started with, improve, and ultimately master the SQL language.
To that end, on the pages to come, you will find a bunch of truly helpful SQL coding resources, each answering a key question you need the answer to. We also provide a list of resources, broken down by level: beginner, intermediate, and advanced, to ensure you get the support you need, no matter at what level you may find yourself.
Where do the resources come from? Our members and staff. We individually screen every resource prior to posting to ensure high quality and to verify the authenticity of each. If it's listed, it means a) one of our Break Diving members has used the resource and highly recommends it, and b) the listed resource has in some way supported the growth of Break Diving and believes in our mission (or at the very least, has not actively refused to support our mission). You can trust that each resource we list is legitimate, and has our Break Diving seal of approval. If you have any issues with any of the resources listed, please reach out and let us know!
That all being said, it's time to take a deep dive into SQL. Ready?