Re: [HACKERS] Non-group columns with aggregate functions

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> Hi All,
>
> I had seen the answer for my question before, but hacker's E-mail search
> isn't finding any word.
>
> I'm using PgSQL 6.5.2 with RHLinux 6.0.
>
> How can I use non-group columns in a select with aggregate functions ? To
> me, the following query makes sense.
>
> teste=> create table people(pp_id int2 primary key, pp_name text);
> NOTICE: CREATE TABLE/PRIMARY KEY will create implicit index 'people_pkey'
> for table 'people'
> CREATE
> teste=> create table workpgsql(wp_people int2, wp_date date, hoursofwork
> int2);
> CREATE
> teste=> insert into people values (1,'ME');
> INSERT 226808 1
> teste=> insert into people values (2,'YOU');
> INSERT 226809 1
> teste=> insert into workpgsql values (1,'01/01/2000',5);
> INSERT 226810 1
> teste=> insert into workpgsql values (1,'01/01/2000',4);
> INSERT 226811 1
> teste=> insert into workpgsql values (2,'01/01/2000',6);
> INSERT 226812 1
> teste=> insert into workpgsql values (2,'01/01/2000',6);
> INSERT 226813 1
> teste=> select pp_name,wp_date,sum(hoursofwork) from people,workpgsql
> teste-> where pp_id=wp_people
> teste-> group by wp_people,wp_date;
> ERROR: Illegal use of aggregates or non-group column in target list
>
> If anybody knows how to rebuild this query to work, thanks in advance.

New 7.0 error message will be:

ERROR: Attribute people.pp_name must be GROUPed or used in an aggregate function

Cause is that you group by wp_people, not pp_name.

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