A little over a year ago, I wrote about the importance of version control for databases.
When I ask development teams whether their database is under version control, I usually get blank stares.
The database is a critical part of your application. If you deploy version 2.0 of your application against version 1.0 of your database, what do you get? A broken application, that's what. That's why your database should always be under source control, right next to your application code. You deploy the app, and you deploy the database. Like peanut butter and chocolate, they are two great tastes that taste great together.
When it comes to version control, the database is often a second or even third-class citizen. From what I've seen, teams that would never think of writing code without version control in a million years-- and rightly so-- can somehow be completely oblivious to the need for version control around the critical databases their applications rely on. I don't know how you can call yourself a software engineer and maintain a straight face when your database isn't under exactly the same rigorous level of source control as the rest of your code. Don't let this happen to you. Get your database under version control.
I was thinking about this again because my friend and co-author K. Scott Allen just wrote a brilliant five part series on the philosophy and practice of database version control:
- Three rules for database work
- The Baseline
- Change Scripts
- Views, Stored Procedures and the Like
- Branching and Merging
K is one of the smartest software developers I know. Read it all; even if you currently have your database under version control (and bully for you if you do), there is much food for peanut buttery chocolatey thought here. It doesn't matter what tools you use-- per the agile manifesto, individuals and interactions are more important than processes and tools. Just get your database under version control already.