Hello Austin,
Please note that ER Diagram in StarUML is for high-level entity-relationship modeling, not for a particular database design.
For "NOT-NULL", there is a "nullable" property (uncheck means not-null) for column element.
Thanks,
StarUML Team
2017년 4월 16일 일요일 오후 3시 50분 32초 UTC+9, Austin Page 님의 말: