Re: [SQL] How to quote date value?
Thanks, I learnt to use:
SELECT CAST('1/11/2003' AS DATE) AS invoice_number;
and it does what I would expect ;-).
"Stephan Szabo" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
>
> On Fri, 21 Nov 2003, Gaetano Mendola wrote:
>
> > nobody wrote:
> > > I have found it in documentation, it is single quote. But it does not
> > > explain why
> > >
> > > SELECT '1/11/2003' AS "InvoiceDate";
> > >
> > > returns "unknown" data type instead of "date".
>
> (I haven't seen the original message yet, so I'm replying to a reply)
> Date literals are generally written as:
> DATE '1/11/2003'
>
> PostgreSQL will try to guess what type you meant with quoted strings in
> expressions, but in the above there isn't enough context to do guess that
> you meant a date really (it should probably actually be thought of as a
> string in such cases).
>
>
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[SQL] How to quote date value?
What is correct character to quote date values in SELECT. Is is single quote? When I do: SELECT '1/11/2003' AS "InvoiceDate"; the returned value is of unknown type (not a date). Then I tried: SELECT 1/11/2003 AS "InvoiceDate"; and the InvoiceDate was set to zero (I guess the engine divided the numbers in date). Then I tried: SELECT 1-11-2003 AS "InvoiceDate"; and the numbers in date value got substracted. Using PostgreSQL 7.4 and PgAdmin 3. Any insight is welcome. ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
Re: [SQL] How to quote date value?
I have found it in documentation, it is single quote. But it does not explain why SELECT '1/11/2003' AS "InvoiceDate"; returns "unknown" data type instead of "date". "nobody" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > What is correct character to quote date values in SELECT. Is is single > quote? > > When I do: > > SELECT '1/11/2003' AS "InvoiceDate"; > > the returned value is of unknown type (not a date). > > Then I tried: > > SELECT 1/11/2003 AS "InvoiceDate"; > > and the InvoiceDate was set to zero (I guess the engine divided the numbers > in date). > > Then I tried: > > SELECT 1-11-2003 AS "InvoiceDate"; > > and the numbers in date value got substracted. > > Using PostgreSQL 7.4 and PgAdmin 3. > > Any insight is welcome. > > ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [SQL] append columns that are null
You are welcome. Only if all problems were that simple ;-)... "Gerwin Philippo" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > THX! didn't know that one yet :) > > nobody wrote: > > "Gerwin Philippo" <[EMAIL PROTECTED]> wrote in message > > news:[EMAIL PROTECTED] > > > >>I have function that appends 2 columns, like > >>"new.field1 = new.field2||new.field3", > >>but when field 3 is null, then the entire outcome is null, while I > >>expected just field2, since when I append nothing to field2, I get > >>field2, right? > >>Is this standard behaviour, and if so, is there another append function > >>that I can use that doesn't behave like this? > > > > > > COALESCE is your friend... > > > > ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [SQL] append columns that are null
"Gerwin Philippo" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > I have function that appends 2 columns, like > "new.field1 = new.field2||new.field3", > but when field 3 is null, then the entire outcome is null, while I > expected just field2, since when I append nothing to field2, I get > field2, right? > Is this standard behaviour, and if so, is there another append function > that I can use that doesn't behave like this? COALESCE is your friend... ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
