SELECT
DATE_PART('days',DATE_TRUNC('month',NOW())
+ '1 MONTH'::INTERVAL
- '1 DAY'::INTERVAL
)
以任何其他日期代替NOW().
SELECT
DATE_PART('days',DATE_TRUNC('month',NOW())
+ '1 MONTH'::INTERVAL
- '1 DAY'::INTERVAL
)
以任何其他日期代替NOW().
