| From: | Geoff Winkless <pgsqladmin(at)geoff(dot)dj> |
|---|---|
| To: | Moreno Andreo <moreno(dot)andreo(at)evolu-s(dot)it> |
| Cc: | PostgreSQL mailing lists <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: CASE(?) to write in a different column based on a string pattern |
| Date: | 2019-11-13 16:36:43 |
| Message-ID: | CAEzk6ff14JeGb0MtbGZLq2vSJ7SrnNE6FzABsRrkb_n592E-YQ@mail.gmail.com |
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| Lists: | pgsql-general |
On Wed, 13 Nov 2019 at 16:24, Moreno Andreo <moreno(dot)andreo(at)evolu-s(dot)it> wrote:
> |foo |bar |baz |
> 1234
> 5678
> 9012
> (hoping text formatting is ok... 1234 should go in column foo, 568 in
> bar and 9012 in baz)
>
> Is it possible?
Simplest way in plain SQL would be individual case statements for each
column, I think.
SELECT pattern,
CASE WHEN pattern LIKE 'foo%' THEN SUBSTR(pattern, 4) ELSE '' END AS foo
CASE WHEN pattern LIKE 'bar%' THEN SUBSTR(pattern, 4) ELSE '' END AS bar
CASE WHEN pattern LIKE 'baz%' THEN SUBSTR(pattern, 4) ELSE '' END AS baz
FROM tbl;
Geoff
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