我实际上很喜欢Andomar的解决方案（添加了自动填充Periods表的流程），但出于乐趣，这里的解决方案不需要它。
CREATE TABLE your_table (start_date date, end_date date);
INSERT INTO your_table VALUES ('Jan-17-2008', 'May-20-2009');
SELECT
GREATEST(start_date, ('04-01-'||series.year)::date) AS year_start,
LEAST(end_date, ('03-31-'||series.year + 1)::date) AS year_end
FROM
(SELECT
start_date,
end_date,
generate_series(
date_part('year', your_table.start_date - INTERVAL '3 months')::int,
date_part('year', your_table.end_date - INTERVAL '3 months')::int)
FROM your_table) AS series(start_date, end_date, year)
ORDER BY
start_date;
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