ERD

erDiagram
  problem {
    emis_observation_guid VARCHAR PK
    emis_registration_guid VARCHAR FK
    patient_id VARCHAR FK
    emis_registration_organisation_guid VARCHAR FK
    emis_parent_observation_guid VARCHAR FK
    emis_last_review_userinrole_guid VARCHAR FK
    study_id VARCHAR FK
  }

  patient {
    emis_registration_id VARCHAR PK
  }

  organisation {
    emis_organisation_guid VARCHAR PK
  }

  user_in_role {
    emis_userinrole_guid VARCHAR PK
  }

  problem || -- o{ problem : "parent_problem"

  recruit_included_patients_view {
    emis_patient_id VARCHAR PK
    study_id VARCHAR
  }

  user_studies {
    study_id VARCHAR PK
  }

  problem }|--|{ patient : "registered_to"
  problem }|--|{ organisation : "in_organisation"
  problem }|--|{ problem : "parent_problem"
  problem }|--|{ user_in_role : "last_reviewed_by"
  problem }|--|{ recruit_included_patients_view : "for_patient"
  problem }|--|{ user_studies : "in_study"