1:N
| Tip |
|---|
Ex: One Contact to many Appointments - contact_appointments. |
| Warning |
|---|
Ex: One Contact to many Appointments - contacts_appointments, contacts_appointment. |
N:1
| Tip |
|---|
Ex: Many Contacts one Organization - organization_contacts |
| Warning |
|---|
Ex: Many Contacts one Organization - organizations_contact, organizations_contacts. |
N:N
| Tip |
|---|
Ex: Many Events to Many Contacts - events_contacts |