postgresql - Default timestamp format and fractional seconds -


i'm trying format timestamps in postgres database format:

yyyy-mm-dd hh24:mi:ss

by doing:

update mytable set tds = to_char(tds, 'yyyy-mm-dd hh24:mi:ss')::timestamp;

i managed set stored tds format. however, newly added entry goes to: yyyy-mm-dd hh24:mi:ss.ms since default set now().

how change newly added entries have format: yyyy-mm-dd hh24:mi:ss?

there no format stored in timestamp type. can set default timestamp truncated second @ creation time

create table t (     tds timestamp default date_trunc('second', now()) )

or alter table

alter table t  alter column tds  set default date_trunc('second', now());  insert t values (default); insert 0 1  select * t;          tds          ---------------------  2014-03-11 19:24:11

if don't want show milliseconds part format output

select to_char(now(), 'yyyy-mm-dd hh24:mi:ss');        to_char        ---------------------  2014-03-11 19:39:40

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