Обсуждение: date_part - multiple values in format?

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Is there a way to format date according to a template or 
anything like that?

Looked at the docs, didn't see anything (didn't see actually 
anything much explaining how to get parts of date out) 
appropriate.

I am looking basically for something like:
select date_part('%d %m %y', now()::datetime);

As I see it currently I can only do it with something like:
select ((date_part('day',now()::datetime) || date_part('month', 
now()::datetime)) || date_part('year', now()::datetime);

which is, of course, rather clumsy.

This, btw, goes about concatenation, too.

Will there be a possibility of string concatenation in 7.x so that 
I don't have to put all the concats in brackets? (ie. currently I 
have to: ((((X || Y) || Z ) || A) || B) 
which is of course also rather clumsy and leads to lots of 
typos in case of more complex expressions.

Emils

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"Emils Klotins" <emils@mail.usis.bkc.lv> writes:

> I am looking basically for something like:
> select date_part('%d %m %y', now()::datetime);

I think to_char() addresses this in 7.0, although it doesn't use
the strftime formatting conventions (blame Oracle for that ;-)).
See http://www.postgresql.org/docs/postgres/functions2569.htm

> Will there be a possibility of string concatenation in 7.x so that 
> I don't have to put all the concats in brackets? (ie. currently I 
> have to: ((((X || Y) || Z ) || A) || B) 
> which is of course also rather clumsy and leads to lots of 
> typos in case of more complex expressions.

What?

regression=# select 'a'::text || 'b'::text || 'c'::text;?column?
----------abc
(1 row)

6.5.3 behaves the same ...
        regards, tom lane

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[2 Mar 00,, 10:46] Tom Lane wrote:

> "Emils Klotins" <emils@mail.usis.bkc.lv> writes:
> > Will there be a possibility of string concatenation in 7.x so that 
> > I don't have to put all the concats in brackets? (ie. currently I 
> > have to: ((((X || Y) || Z ) || A) || B) 
> > which is of course also rather clumsy and leads to lots of 
> > typos in case of more complex expressions.
> What?
> regression=# select 'a'::text || 'b'::text || 'c'::text;
>  ?column?
> ----------
>  abc
> (1 row)
> 6.5.3 behaves the same ...

Sorry about that. I don't remember at which version I did have 
to use the form of concatenation I mentioned (6.4.x? 6.5.2?), 
but yes, 6.5.3 seems to work fine without brackets.

Emils

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