Sorry I forgot to mention. The table that I am working on right now doesn't have any unique column. AFAIK, I can only use ON CONFLICT if there's an error for unique column.
On Thu, May 24, 2018 at 8:04 AM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
On 05/23/2018 04:58 PM, tango ward wrote:
Thanks masters for responding again.
I've tried running the code:
INSERT INTO my_table(name, age)
SELECT name, age
WHERE NOT EXISTS(SELECT name FROM my_table WHERE name= name)
The first thing I see is that:
SELECT name, age
is not being selected from anywhere, for example:
SELECT name, age FROM some_table.
The second thing I see is why not use ON CONFLICT?
this doesn't give me error but it doesn't insert data either.
On Thu, May 24, 2018 at 3:35 AM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@aklaver.com >> wrote:
On 05/23/2018 10:00 AM, David G. Johnston wrote:
On Wednesday, May 23, 2018, tango ward <tangoward15@xxxxxxxxx
<mailto:tangoward15@xxxxxxxxx> <mailto:tangoward15@xxxxxxxxx
<mailto:tangoward15@xxxxxxxxx>>> wrote: adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@aklaver.
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 Klavercom >
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
