Hi Mathieu,
Database icon is not supported in Deployment Diagram and that is not specified in UML specification. But we can consider to add database element for convenience if many users are expecting this feature.
If you means database modeling, you can create ER diagram by selecting "Add Diagram > ER Diagram" menu in StarUML v2.1.0
Thanks,
StarUML Team
2015년 3월 3일 화요일 오전 11시 10분 27초 UTC+9, Mathieu Mani 님의 말: