On Wednesday, May 23, 2018, tango ward <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.
David J.