In this chapter, we've gone from the early days of databases to the relational databases that are so prolific today. We've explored the concept of normalization and how it's applied to the relational paradigm. We've looked at tables and how they are structured and introduced the Structured Query Language for relational databases. We've also examined some of the popular SQL tools and created the tables needed for the
Companylink database. Finally, we've worked our way around the SQL Developer tool and learned the basics of how to execute queries.
Now that we've learned about relational databases and SQL, we're ready to begin writing SQL statements—the topic of the next chapter.