If you want to install Oracle SQL Developer on your Windows computer for free, check if you meet the requirements and then go through the instructions mentioned here.

How to Connect to DB2 With SQL Developer. The Oracle SQL Developer tool can connect to databases other than Oracle, including MySQL, Microsoft SQL Server and DB2. The SQL development environment ...

Here’s how one programmer went from a college kid in El Salvador to a developer in England in four years. This is the first in a series of Oracle APEX-fueled career stories.