I used Toad Data Modeler to construct a ERD for a University assignment and have received my mark back with the notation:
“at each end of a relationship, there should be 2 sets of symbols–connectivity and participation. Right now only one end of a relationship has participation symbols.”
I am unable to find anywhere how I can format the relationship to show the “one and only one” symbol for the parent entity in a crows foot diagram where there is a one to many relationship, the 2 vertical lines i.e. -||-----O<-. What Toad generated in my ERD was -|------O<-. In my relationship properties I used Identifying and mandatory parent in the cardinality.
Any advice would be appreciated.
