In this chapter, you have learned how to manage your database schema and schema changes using source control. You know about both the migration-based and end state based storing of changes, and how to apply them to your production database in a safe manner.

Additionally, you have learned how schema-less databases can remove the burden of traditional schema management. However, this comes at the price of having to cope with schema differences when reading older versions of an object back from the database.

In the next chapter, you will learn about continuous testing. You will not only learn about testing techniques, but also about which to apply at what point, and how testing is a crucial part of DevOps and a critical enabler of a continuous flow of value to end users.