HomeDiagramsER diagramER: Exactly One to Exactly One (||--||)

ER: Exactly One to Exactly One (||--||)

One-to-one mandatory relationship.

er-exactly-one-to-exactly-one.mmd
erDiagram
  PERSON ||--|| PASSPORT : has
Output
ER diagram, Zombie Mermaid PERSON (no attributes) PASSPORT (no attributes) has

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