Re: help in writing query

maria s escreveu:
>
> I tried the query and it is returning result as ,
> for a single entry in sample info in separate rows
>
> The result of the query as
>
> 1, prop1,value1
> 1,prop2,value2
> 2,prop1,value1
> 2 prop2,value2
> 2 prop3,value3
>
> but i want the output as single row per sample id like
>
> 1,value1,value2
> 2 value1,value2,value3
>
> Is this possible? or functions will help to get the result?

Try tablefunc/crosstab:
http://www.postgresql.org/docs/current/interactive/tablefunc.html

>
> please help.
>
> Thanks,
> -maria
>
> On Tue, Jun 10, 2008 at 11:03 AM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com
> <mailto:pavel(dot)stehule(at)gmail(dot)com>> wrote:
>
> Hello
>
> SELECT i.name <http://i.name>, p.property_name, p.property_value
> FROM sample_info i
> JOIN
> sample_properties p
> ON i.id <http://i.id> = p.id <http://p.id>
>
> maybe
> Pavel
>
> 2008/6/10 maria s <psmg01(at)gmail(dot)com <mailto:psmg01(at)gmail(dot)com>>:
> > Hello friends,
> > I need help in write a query.
> >
> > I have 2 tables, one is sample_info and sample_properties,
> >
> > sample_info (id integer, string name)
> > ------------------
> > 1, c_01
> > 2, c_02
> > ...
> >
> > sample_properties(sample_id integer(ref. sample_info),
> property_name string
> > ,property_value string )
> > -------------------------
> > 1, prop1, value1
> > 1, prop2, value2
> > 2, prop1, value1
> > 2, prop2, value 2
> > 2, prop3, value3
> >
> >
> > I would like to get the result by joining 2 tables, for sample
> id 1 from
> > sample_info, the result should be
> >
> > 1,c_01,value1,value2
> >
> > for sample 2
> >
> > 2, c_02,value1,value2,value3
> >
> > with property_value column header as property_name
> >
> > Can anyone help me to write a query /function/view to get the
> above output?
> >

Osvaldo