On 05/23/2018 10:00 AM, David G. Johnston wrote:
On Wednesday, May 23, 2018, tango ward <tangowar...@gmail.com <mailto:tangowar...@gmail.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.kla...@aklaver.com

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