example:
a query returns a column that contains arrays:
select * FROM (VALUES (ARRAY[1,2,3,3,4], 1), (ARRAY[1,2,2,3,4], 2)) t;
column1 | column2
-------------+---------
{1,2,3,3,4} | 1
{1,2,2,3,4} | 2
(2 rows)
and then we want aggregate that result.
example by column2:
WITH "test" AS (
select * FROM (VALUES (ARRAY[1,2,3,3,4], 1), (ARRAY[1,2,2,3,4], 2)) t
)
SELECT array_agg(column2) column2 FROM "test";
column2
---------
{1,2}
(1 row)
and I want aggregate column1 arrays into one array. I want receive the
result:
column1 | column2
----------------------+-------------
{1,2,3,3,4,1,2,2,3,4} | {1,2}
I've tried the statement:
WITH "test" AS (
select * FROM (VALUES (ARRAY[1,2,3,3,4], 1), (ARRAY[1,2,2,3,4], 2)) t
)
SELECT
array_agg(unnest(column1)) AS column1,
array_agg(column2) column2
FROM
"test";
But I receive the error:
ERROR: set-valued function called in context that cannot accept a set
How can I aggregate arrays into one array?
--
. ''`. Dmitry E. Oboukhov
: :’ : email: unera@xxxxxxxxxx jabber://UNera@xxxxxx
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