You probably heard about the DevOps movement. The idea is that developers and operations often don't get along very well and that we have to change that in order to produce, deploy and maintain high quality software fast. I certainly agree with this movement. I have seen the great divide between developers and operations bring projects more or less to a full stop.

But there is another big divide running through many software development teams: Application developers versus database developers (or administrators).

In my experience this divide manifests itself in these ways:

You two, listen up: It is your project. If it sucks or even fails, nobody will ask if it was the database part of the team or the application part of the team. It's just the team. So I'll expect the following from you:

Application Developers: Learn yourself some SQL. And I don't mean select * from table. I mean merge statements, analytic functions, DDL and PL/SQL. Learn to read Explain plans and how to use data dictionary views. If there is a database related problem try to solve it. If you fail get help by a database expert, but make sure you are doing the work, so next time you can fix a similar problem yourself.

Database Developers: Learn the programming language used by the rest of the team. Learn what is happening in on the Continuous Integration system. Make sure it massages your database scripts as well. Read about refactoring databases, continuous integration of databases and listen to this podcast about agile database development.

Both: Get used to the fact that there are many aspects to a project and you probably understand only half of them. Get in the habit to talk to the guys and girls understanding the other half.