| From: | Raymond O'Donnell <rod(at)iol(dot)ie> |
|---|---|
| To: | Ramesh T <rameshparnanditech(at)gmail(dot)com>, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>, pavel(dot)stehule(at)gmail(dot)com, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Collection |
| Date: | 2015-02-13 17:10:20 |
| Message-ID: | 54DE2FFC.10905@iol.ie |
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| Lists: | pgsql-general |
On 13/02/2015 13:13, Ramesh T wrote:
> cast(COLLECT (r_id) as num) in oracle..
>
> is their *collect *function in postgres plpgsql....?or any alternate
> for this..?
I don't use Oracle, but I think array_agg() is the closest - it
aggregates the column into an array.
postgres=# create table test(a integer, b text);
CREATE TABLE
postgres=# insert into test values (1, 'abc');
INSERT 0 1
postgres=# insert into test values (2, 'def');
INSERT 0 1
postgres=# insert into test values (2, 'ghi');
INSERT 0 1
postgres=# select a, array_agg(b) from test group by a;
a | array_agg
---+-----------
1 | {abc}
2 | {def,ghi}
(2 rows)
Ray.
--
Raymond O'Donnell :: Galway :: Ireland
rod(at)iol(dot)ie
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