On 04/16/2014 04:19 AM, Glenn Pierce wrote:
Although I guess something like this would do it ?
UPDATE sensor_values ts = ts - interval (1 hour) WHERE ts BETWEEN
('2014-03-30 01:00', '2014-10-26 02:00')
I would say:
UPDATE sensor_values ts = ts - interval '1 hour' WHERE ts BETWEEN
('2014-03-30 01:00', '2014-10-26 02:00')
or
UPDATE sensor_values ts = ts - '1 hour'::interval WHERE ts BETWEEN
('2014-03-30 01:00', '2014-10-26 02:00')
I am assuming the BETWEEN clause in this case contains dummy values
because in your post you say only some values are incorrect.
On 16 April 2014 11:56, Glenn Pierce <glennpie...@gmail.com
<mailto:glennpie...@gmail.com>> wrote:
Hi I have an issue with adjusting a timestamp.
I have a table like
CREATE TABLE sensor_values
(
ts timestamp with time zone NOT NULL,
value double precision NOT NULL DEFAULT 'NaN'::real,
)
It was intended that ts timestamps would be the time we wanted to
store in UTC.
Clients would adjust their times to UTC before entering into the
database.
Unfortunately some values have been added with BST times.
The DB thinks they are UTC times but are an hour out this time of year.
Is the a way to adjust those times ? Ie offset the summer times back
an hour ?
Thanks
--
Adrian Klaver
adrian.kla...@aklaver.com
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