> On 21 Feb 2003 at 19:18, Gaetano Mendola wrote:
>
> > > Hi folks,
> > >
> > > This query:
> > >
> > > SELECT element_id as wle_element_id, COUNT(watch_list_id)
> > > FROM watch_list JOIN watch_list_element
> > > ON watch_list.id = watch_list_element.watch_list_id
> > > AND watch_list.user_id = 1
> > > GROUP BY watch_list_element.element_id
> >
> > Try:
> >
> > SELECT element_id as wle_element_id, COUNT(watch_list_id)
> > FROM watch_list JOIN watch_list_element
> > ON watch_list.id = watch_list_element.watch_list_id
> > WHERE
> > watch_list.user_id = 1
> > GROUP BY watch_list_element.element_id
>
> ERROR: Attribute unnamed_join.element_id must be GROUPed or used in
> an aggregate function
>
I think that the wrong problem was solved here. Items in the order by
clause must be in the target list.
heres what it says in the docs
*The ORDER BY clause specifies the sort order:
*SELECT select_list
* FROM table_expression
* ORDER BY column1 [ASC | DESC] [, column2 [ASC | DESC] ...]
*column1, etc., refer to select list columns. These can be either the output
name of a column (see Section 4.3.2) or the number of a column. Some
examples:
Note that "column1, etc., refer to select list"
HTH
Chad
