[xquery-talk] RE: aggregate , grouping

[Michael Kay]

> Grouping is a bit convoluted in XQuery 1.0. I assume here 
> that by "distinct" you mean "having distinct values of the 
> @id attribute".
> 
> You can select the first <trans> element having each distinct id using
> 
> for $i in distinct-values(trans/@id)
> return trans[@id=$i][1]
> 
> But it's not clear to me from your problem description what 
> you then want to do with these elements.
> 
> Michael Kay
> http://www.saxonica.com/ 
> 
> > -----Original Message-----
> > From: fatma helmy [mailto:fatmahelmy2000 at yahoo.com] 
> > Sent: 21 December 2005 11:46
> > To: talk at xquery.com
> > Subject: aggregate , grouping
> > 
> > Dear all
> > suppose i have xml like
> > <trans id=1>
> >    <item>
> >         <elem> it </elem>
> >    </item>
> > </trans>
> > <trans id=2>
> >    <item>
> >         <elem> is </elem>
> >    </item>
> > </trans>
> > 
> > i need to slect distint nodes such that i can
> > automatically get the node names which are <trans> ,
> > <item> , <elem> 
> > and also i want to keep the path they came from for
> > exammple node elem is in the path trans/item/
> > then i need aggregate function which produces the
> > count of certain pathfor example . path item/elem  is
> > repeated twice in trans 1 and trans 2
> > 
> > thanks
> > 
> > 
> > 
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