我有一个表架构为createtableLocation(idintprimarykey,cityvarchar(255),statevarchar(100),countryvarchar(255));createtablePerson(idintprimarykey,namevarchar(100));createtablePhotographer(idintprimarykeyreferencesPerson(id)onupdatecascadeondeletecascade,livesInintnotnullreferencesLocation(id)onupdatecascade