Step One:

Copy and paste the license key and click 'Custom Installation'

Step Two:

Select one of these two options:

• Embedded database: Confluence will use an embedded database (Hypersonic SQL). This is recommended only for evaluation or demonstration. To ensure your data is kept safe and consistent, we recommend production deployments of Confluence using an external database. You can however, migrate to another database later on, if you wish.

If you select this option, you are now ready to start using Confluence

• External Database: Deploy Confluence against one of these compatible databases. Select it from the drop-down menu and click 'External Database'.
  
  • PostgreSQL
  • MySQL
  • Oracle 8i
  • Oracle 9i/10g
  • Microsoft SQL Server
  • Sybase Ase
  • DB2
  • Unsupported Database

Proceed with an external database