La razón por la que obtuvo un error en su consulta es que antes de definir la subconsulta, debe indicar qué desea seleccionar de ella. Entonces, si lo hubiera prefijado con select * from habría sido una consulta válida.
Tenga en cuenta que no tiene que hacer esos or operaciones, ya que puede hacerlo más corto con un in operador.
También debe negar algunas comparaciones (como ya tiene NOT ) y truncar fechas con TRUNC .
Esta es la consulta que sugeriría:
SELECT TEMP.REG_ID,
TEMP.EVENT_TYPE,
TEMP.EVENT_DATE,
TEMP.PRODUCT_CD,
TEMP.TERM_START_DATE,
CASE WHEN TEMP.EVENT_TYPE IN ('NEW SUBSCRIPTION', 'RENEWAL', 'UPSELL')
AND TEMP.NEXT_EVENT_TYPE = 'CANCELLATION' THEN
LEAST(TEMP.TERM_END_DATE, TEMP.NEXT_TERM_END_DATE)
ELSE TEMP.TERM_END_DATE
END AS TERM_END_DATE,
TEMP.DAYS,
TEMP.AMT
FROM (SELECT REG_ID,
EVENT_TYPE,
EVENT_DATE,
PRODUCT_CD,
TERM_START_DATE,
TERM_END_DATE,
DAYS,
AMT,
LAG(EVENT_TYPE, 1, '-') over (
PARTITION BY REG_ID, PRODUCT_CD
ORDER BY EVENT_DATE, TERM_START_DATE) as PREV_EVENT_TYPE,
LAG(EVENT_DATE, 1) over (
PARTITION BY REG_ID, PRODUCT_CD
ORDER BY EVENT_DATE, TERM_START_DATE) as PREV_EVENT_DATE,
LEAD(EVENT_TYPE, 1, '-') over (
PARTITION BY REG_ID, PRODUCT_CD
ORDER BY EVENT_DATE, TERM_START_DATE) as NEXT_EVENT_TYPE,
LEAD(EVENT_DATE, 1) over (
PARTITION BY REG_ID, PRODUCT_CD
ORDER BY EVENT_DATE, TERM_START_DATE) as NEXT_EVENT_DATE,
LEAD(TERM_END_DATE, 1) over (
PARTITION BY REG_ID, PRODUCT_CD
ORDER BY EVENT_DATE, TERM_START_DATE) as NEXT_TERM_END_DATE
FROM export_table) TEMP
WHERE NOT (TEMP.EVENT_TYPE = 'CANCELLATION'
AND TEMP.PREV_EVENT_TYPE IN ('NEW SUBSCRIPTION', 'RENEWAL', 'UPSELL')
AND TRUNC(TEMP.EVENT_DATE) = TRUNC(TEMP.PREV_EVENT_DATE))
AND NOT (TEMP.NEXT_EVENT_TYPE = 'CANCELLATION'
AND TEMP.EVENT_TYPE IN ('NEW SUBSCRIPTION', 'RENEWAL', 'UPSELL')
AND TRUNC(TEMP.NEXT_EVENT_DATE) = TRUNC(TEMP.EVENT_DATE))
Tenga en cuenta que el term_end_date del registro 6 también se modifica, ya que le es aplicable la regla 2.
