Jeff Davis wrote:
> On Thu, 2009-10-29 at 16:39 -0700, Scott Bailey wrote:
>> But there is some ambiguity around the length of a month. So INTERVAL '1
>> month - 30 days' = INTERVAL '0 days' = INTERVAL '-1 month +30 days'.
>> But when added to a date, it makes no change for months with 30 days,
>> adds 1 day for months with 31 days and subtracts 2 days for February.
or 1 day for February, 2012.
--
Lew