| From: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
|---|---|
| To: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, tango ward <tangoward15(at)gmail(dot)com> |
| Cc: | "pgsql-generallists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Insert data if it is not existing |
| Date: | 2018-05-23 19:35:57 |
| Message-ID: | 0a76f762-88d8-75a7-de3c-d76094638fdd@aklaver.com |
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| Thread: | |
| Lists: | pgsql-general |
On 05/23/2018 10:00 AM, David G. Johnston wrote:
> On Wednesday, May 23, 2018, tango ward <tangoward15(at)gmail(dot)com
> <mailto:tangoward15(at)gmail(dot)com>> wrote:
>
> I just want to ask if it's possible to insert data if it's not
> existing yet.
>
>
> This seems more like a philosophical question than a technical one...
> but the answer is yes:
>
> CREATE TABLE test_t (a varchar, b varchar, c integer);
> INSERT INTO test_t
> SELECT '1', '2', 3 WHERE false; --where false causes the data to
> effectively "not exist"
>
> As for ON CONFLICT: conflicts can only happen between things that exist.
Well that made my day:)
>
> David J.
>
--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com
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