【Postgresql】 generate_seriesを使ったシーケンス（日付）
select
*
from GENERATE_SERIES('2020-03-12'::timestamp, '2030-03-12'::timestamp, '6 month'::INTERVAL);
generate_series
---------------------
2020-03-12 00:00:00
2020-09-12 00:00:00
2021-03-12 00:00:00
2021-09-12 00:00:00
2022-03-12 00:00:00
2022-09-12 00:00:00
2023-03-12 00:00:00
2023-09-12 00:00:00
2024-03-12 00:00:00
2024-09-12 00:00:00
2025-03-12 00:00:00
2025-09-12 00:00:00
2026-03-12 00:00:00
2026-09-12 00:00:00
2027-03-12 00:00:00
2027-09-12 00:00:00
2028-03-12 00:00:00
2028-09-12 00:00:00
2029-03-12 00:00:00
2029-09-12 00:00:00
2030-03-12 00:00:00
(21 rows)
