ERD

erDiagram
  allergy {
    emis_observation_guid VARCHAR PK
    pseudo_registration_guid VARCHAR FK
    pseudo_patient_id VARCHAR FK
    emis_registration_organisation_guid VARCHAR FK
    emis_authorising_userinrole_guid VARCHAR FK
    emis_enteredby_userinrole_guid VARCHAR FK
    emis_consultation_guid VARCHAR FK
    emis_code_id VARCHAR FK
    study_id VARCHAR FK
  }

  patient {
    registration_guid VARCHAR PK
  }

  organisation {
    emis_organisation_guid VARCHAR PK
  }

  user_in_role {
    emis_userinrole_guid VARCHAR PK
  }

  consultation {
    emis_consultation_guid VARCHAR PK
  }

  clinical_code {
    emis_code_id VARCHAR PK
  }

  recruit_included_patients_view {
    emis_patient_id VARCHAR PK
    study_id VARCHAR
  }

  user_studies {
    study_id VARCHAR PK
  }

  allergy }|--|{ patient : "registered_to"
  allergy }|--|{ organisation : "recorded_at"
  allergy }|--|{ user_in_role : "authorised_by"
  allergy }|--|{ user_in_role : "entered_by"
  allergy }|--|{ consultation : "noted_in"
  allergy }|--|{ clinical_code : "uses_code"
  allergy }|--|{ recruit_included_patients_view : "for_patient"
  allergy }|--|{ user_studies : "in_study"