このクエリは必要なものを返す必要があります:
SELECT country, partner, ok_rate
FROM TABLE WHERE ok_rate <= 98
AND period_duration = (SELECT MAX(period_duration)
FROM TABLE)
このクエリは必要なものを返す必要があります:
SELECT country, partner, ok_rate
FROM TABLE WHERE ok_rate <= 98
AND period_duration = (SELECT MAX(period_duration)
FROM TABLE)