Use uma cláusula de fatoração de subconsulta recursiva:
WITH ranges ( start_dt, end_dt, id ) AS (
SELECT start_dt, end_dt, id
FROM table_name
UNION ALL
SELECT start_dt + INTERVAL '1' DAY, end_dt, id
FROM ranges
WHERE start_dt + INTERVAL '1' DAY <= end_dt
)
SELECT start_dt,
id
FROM ranges;
Qual para seus dados de amostra:
CREATE TABLE table_name ( start_dt, end_dt, id ) AS
SELECT DATE '2013-04-05', DATE '2013-04-09', 1 FROM DUAL
Saídas:
db<>fiddle aqui
