Se você deseja ter uma data sequencial de data a data, use essa seleção:
SELECT DATE '2017-11-01' + LEVEL - 1 AS D, LEVEL AS I
FROM DUAL
CONNECT BY LEVEL <= DATE '2017-11-15' - DATE '2017-11-01' + 1;
SELECT DATE '2017-11-01' + LEVEL - 1 AS D, LEVEL AS I
FROM DUAL
CONNECT BY LEVEL <= DATE '2017-11-15' - DATE '2017-11-01' + 1;