| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | Peter Koukoulis <pkoukoulis(at)gmail(dot)com> |
| Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: select md5 result set |
| Date: | 2017-08-03 00:21:26 |
| Message-ID: | CAKFQuwbA=o+=KW4Mf5B4G8SJsWJwwKiQcnpDN4UdmbXyY_hkbw@mail.gmail.com |
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| Lists: | pgsql-general |
On Wed, Aug 2, 2017 at 4:50 PM, Peter Koukoulis <pkoukoulis(at)gmail(dot)com>
wrote:
> david, thanks for the help.
>
> Would this be the equivalent, for the statement in your email, for table
> TEST1 (x integer, y varchar(20)):
>
> ft_node=# SELECT md5(string_agg(vals::text, ''))
> ft_node-# from (select x,y from test1) vals(x,y);
> ?
>
>
The subquery is redundant if you already have a table:
select md5(string_agg(test1::text, '')) from test1;
David J.
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