Eu usei your_table como uma tabela com
outerjoin , conforme usado last_value para inserir dados anteriores, dê uma olhada nisso :) SELECT last_value(m.data ignore nulls) over (order by n.mydate) data,
n.mydate
FROM
(SELECT DATA, mydate FROM your_table
) m,
(SELECT TRUNC(SYSDATE, 'MM')-1+LEVEL mydate FROM dual CONNECT BY LEVEL <= 30
)n
WHERE m.mydate(+) = n.mydate
ORDER BY n.mydate;
mexa aqui
Você pode usar
lag() function também , mas não preencherá os dados se o intervalo de datas for maior que um., apenas preenche os dados anteriores imediatos, nvl(m.data, lag(m.data)over(order by n.mydate))
-edição -
para seus dados:
SELECT n.mydate VALUE_DATE,
last_value(m.STK_EXCH IGNORE NULLS) OVER (ORDER BY n.mydate) STK_EXCH,
last_value(m.SECURITY IGNORE NULLS) OVER (ORDER BY n.mydate) SECURITY,
last_value(m.mkt_price IGNORE NULLS) OVER (ORDER BY n.mydate) MKT_PRICE
FROM
(SELECT VALUE_DATE, STK_EXCH, SECURITY, MKT_PRICE FROM MKT
) m,
(SELECT TRUNC(SYSDATE, 'MM')-1+LEVEL mydate FROM dual CONNECT BY LEVEL <= 30
)n
WHERE TRUNC(m.VALUE_DATE(+)) = TRUNC(n.mydate)
ORDER BY n.mydate;
ou um pouco mais específico:use abaixo:
SELECT full_date,
NVL(stk_exch,last_value(stk_exch IGNORE NULLS)OVER(ORDER BY full_date))stk_exch,
NVL(security,last_value(security IGNORE NULLS)OVER(ORDER BY full_date))security,
NVL(mkt_price,last_value(mkt_price IGNORE NULLS)OVER(ORDER BY full_date))mkt_price
FROM
(SELECT TRUNC(m.vd,'MM')-1+LEVEL FULL_DATE
FROM
(SELECT MIN(VALUE_DATE) vd FROM mkt
WHERE TO_CHAR( value_date, 'MM/YYYY') = TO_CHAR(sysdate-12,'MM/YYYY') -- this line may vary to your requirement
) m
CONNECT BY LEVEL <= TO_CHAR(LAST_DAY(M.VD), 'DD')
)first_q,
( SELECT value_date, stk_exch, SECURITY, mkt_price FROM mkt
)r
WHERE first_q.full_date = TRUNC(r.value_date(+))
ORDER BY full_date;
veja violino aqui
