Re: [HACKERS] Non-group columns with aggregate functions
От | Bruce Momjian |
---|---|
Тема | Re: [HACKERS] Non-group columns with aggregate functions |
Дата | |
Msg-id | 199912222021.PAA01180@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Non-group columns with aggregate functions ("Ricardo Coelho" <rcoelho@px.com.br>) |
Список | pgsql-hackers |
[Charset iso-8859-1 unsupported, filtering to ASCII...] > 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. -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania19026
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