In an ERD, what does a dotted line connecting entities signify?

  • Many-to-many relationship
  • Many-to-one relationship
  • One-to-many relationship
  • One-to-one relationship
A dotted line connecting entities in an ERD typically signifies a one-to-many relationship. This means that one instance of an entity can be associated with multiple instances of another entity, but each instance of the other entity is associated with only one instance of the first entity. 
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