I think what you are looking for is age()
E.g.
"update schedule set purged = 0 where age('now',dayin) > timespan('30 days'::reltime)"
Presuming a table such as this:
create table schedule (purged int, dayin datetime);
This replaces "day" and "timein" with "dayin."
Troy
>
> Hi everyone,
>
> Does anyone know if postgres has a function similar to what datediff does in
> mssql server? I need it to do an update similar to the one below:
>
> "update schedule set purged = 0 where datediff(day, timein, getdate()) > 30"
>
> I know i could pull the whole table down to my machine, modify the data and
> then upload it back, but that's really stupid not to mention what it'll do
> to network trafic.
>
> Thank you very much for any answer,
> Thinh
>
>
