Обсуждение: Re: [GENERAL] Returning an integer from a date

At 22:18 +0200 on 29/03/1999, Rick Dearman wrote:


>
> I want the number  of seconds since 1970

Basically, the function date_part( 'epoch', expression_of_datetime_type )
returns the number of seconds since 1970. But it returns a float, not an
integer, because datetimes can include milliseconds etc.

For example:

testing=> select date_part( 'epoch' , '1999-03-01 07:38:01.10'::datetime); date_part
-----------
920266681.1
(1 row)

So, you may either write your program to expect a float there (float8), or
you can force it to be an integer using the function int() around the
date_part function. But then you lose the milliseconds.

Herouth

--
Herouth Maoz, Internet developer.
Open University of Israel - Telem project
http://telem.openu.ac.il/~herutma