Re: Select Distinct Order By Array_Position - Mailing list pgsql-sql

From David G. Johnston
Subject Re: Select Distinct Order By Array_Position
Date
Msg-id CAKFQuwa6=d3_BuGQd8sq44bvO0922VNTZGgdk8h_JTaEcpNSYQ@mail.gmail.com
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In response to RE: Select Distinct Order By Array_Position  ("Mark Williams" <markwillimas@gmail.com>)
Responses RE: Select Distinct Order By Array_Position  ("Mark Williams" <markwillimas@gmail.com>)
List pgsql-sql
On Mon, Nov 26, 2018 at 12:58 PM Mark Williams <markwillimas@gmail.com> wrote:
>
> Wasn’t aware it was possible to put array_position statement in the actual select or is this a select within a
select?

Easy enough to try either way

> Also, I am selecting from an ordered (randomly) subset of data and I need to return the result set in the same order
sodo have to output the array as part of the order by? 

Not sure what the question is...

Anyway, maybe this will be helpful:

SELECT vals.*
FROM (VALUES (1::integer),(2),(3),(4),(5)) vals (v),
LATERAL unnest(ARRAY[3,1,5]::integer[]) with ordinality AS spec (s, o)
WHERE v = s
ORDER BY o

David J.


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