Oracle SQL Ciclo attraverso l'intervallo di date

Ecco come potresti ottenere un intervallo di date:

 SELECT DATE'2015-01-01' + LEVEL - 1
   FROM dual
CONNECT BY DATE'2015-01-01' + LEVEL - 1 < DATE'2015-02-01';

Quanto sopra otterrà tutte le date nell'intervallo dal 1 gennaio 2015 al 31 gennaio 2015.

Quello che potresti fare, utilizzando quanto sopra, è inserire le date di inizio e fine e creare un CTE, quindi utilizzare un join esterno nelle date:

WITH dr AS (
    SELECT DATE'2015-01-01' + LEVEL - 1 AS transaction_date
      FROM dual
   CONNECT BY DATE'2015-01-01' + LEVEL - 1 < DATE'2015-01-04'
)
SELECT V.VISIT_ID, dr.transaction_date
     , P.NAME_LAST, ETT.ENC_TRANS_TYPE_NAME
...
       ENCOUNTER_TRANSACTION ET RIGHT JOIN dr
    ON ET.ENCOUNTER_TRANSACTION_DATE = dr.transaction_date

AGGIORNAMENTO Ho avuto del tempo e penso di vedere come quanto sopra può essere integrato nella tua query. Non ho davvero dati di esempio per SQL Fiddle (hai comunque molte tabelle per quello). Ecco da dove potresti iniziare, questo dovrebbe ottenere tutte le visite appropriate più ogni data lungo l'intervallo di date della visita (supponendo che nessuna visita superi i 30 giorni - aggiustalo di conseguenza):

WITH dr AS (
    SELECT LEVEL AS dd FROM dual
   CONNECT BY LEVEL <= 30 -- I'm assuming a max date range of 30; increase as you see fit
)
SELECT v.visit_id, v.start_date - 1 + dr.dd AS encounter_transaction_date
     , p.name_last, ett.enc_trans_type_name
  FROM visit v CROSS JOIN dr
 WHERE v.start_date - 1 + dr.dd < TRUNC(v.end_date) + 1
   AND v.institution_id = 1
   AND v.end_date IS NOT NULL
   AND v.voided_yn = 'N'
   AND v.care_setting_code = 'I'
   AND v.patient_team_id IN (16,17,18)
   AND v.start_date >= TRUNC(ADD_MONTHS(CURRENT_DATE, -1), 'MONTH')
   AND v.end_date < TRUNC(CURRENT_DATE, 'MONTH');

Quindi penso che i tuoi join esterni dovrebbero essere LEFT JOIN da lì (almeno, se ho capito bene cosa potrei non essere:

WITH dr AS (
    SELECT LEVEL AS dd FROM dual
   CONNECT BY LEVEL <= 30 -- I'm assuming a max date range of 30; increase as you see fit
)
SELECT v.visit_id, v.start_date - 1 + dr.dd AS encounter_transaction_date
  FROM visit v CROSS JOIN dr
  LEFT JOIN encounter_transaction et
    ON v.visit_id = et.visit_id
   AND v.institution_id = et.institution_id
   AND TRUNC(v.start_date - 1 + dr.dd) = et.encounter_transaction_date
  LEFT JOIN encounter_transaction_type ETT
    ON et.encounter_type_id = ett.encounter_transaction_type_id
  LEFT JOIN local_provider lp
    ON et.ordering_provider_id = lp.local_provider_id
  LEFT JOIN person_identifier i
    ON i.identifier = lp.provider_number
   AND i.identifier_sys_id = lp.provider_number_sys_id
   AND i.identifier IN (
       '1234', --Smith
       '4321' --Jones ** you had an extra comma here!
)
  LEFT JOIN person p
    ON p.person_id = i.person_id
 WHERE v.start_date - 1 + dr.dd < TRUNC(v.end_date) + 1
   AND v.institution_id = 1
   AND v.end_date IS NOT NULL
   AND v.voided_yn = 'N'
   AND v.care_setting_code = 'I'
   AND v.patient_team_id IN (16,17,18)
   AND v.start_date >= TRUNC(ADD_MONTHS(CURRENT_DATE, -1), 'MONTH')
   AND v.start_date < TRUNC(CURRENT_DATE, 'MONTH');