Re: ARRAY_AGG and ORDER

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От Sterpu Victor
Тема Re: ARRAY_AGG and ORDER
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Msg-id em0337b323-952a-4e65-be90-42d590d5b4dd@victor-pc
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Ответ на ARRAY_AGG and ORDER  ("Sterpu Victor" <victor@caido.ro>)
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Yes, thank you. :)
 
------ Original Message ------
From: "Sterpu Victor" <victor@caido.ro>
To: "Geoff Winkless" <pgsqladmin@geoff.dj>
Sent: 11/26/2015 2:51:48 PM
Subject: Re[2]: [GENERAL] ARRAY_AGG and ORDER
 
Yes, thank you. :)
 
 
------ Original Message ------
From: "Geoff Winkless" <pgsqladmin@geoff.dj>
To: "Sterpu Victor" <victor@caido.ro>
Cc: "PostgreSQL General" <pgsql-general@postgresql.org>
Sent: 11/26/2015 2:46:33 PM
Subject: Re: [GENERAL] ARRAY_AGG and ORDER
 
On 26 November 2015 at 12:43, Sterpu Victor <victor@caido.ro> wrote:
Hello
 
I need to order an array using another column in table ad_query_join_select.
I need something like this but this is not a valid SQL:
SELECT array_to_string(array_agg(aqjs.id ORDER BY aqjs.to_left), ',') AS str, aq.name
FROM ad_query aq
JOIN ad_query_join_select aqjs ON (aqjs.id_ad_query = aq.id)
GROUP BY aq.id, aq.name;
 
Is there some equivalent syntax in Postgres?
 
​As per the manual?

​http://www.postgresql.org/docs/current/static/sql-expressions.html#SYNTAX-AGGREGATES

​SELECT string_agg(a, ',' ORDER BY a) FROM table;

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