PostgreSQL database - only insert if the record doesn't exist [duplicate]

Question

Possible Duplicate:
Cannot SELECT from UPDATE RETURNING clause in postgres

I am using a PostgreSQL database which has a "company" table and a "country" table which each have a uniqueID.

I want a setup where if I try to add a company to the database, it only adds the company to the database with a new unique ID if it doesn't already exist.

this has already been asked/solved

Woot4Moo
– Woot4Moo

2012-12-16 14:50:10 +00:00
Commented Dec 16, 2012 at 14:50 — Woot4Moo
– Woot4Moo, Commented Dec 16, 2012 at 14:50

Community · Accepted Answer · 2017-05-23 12:19:20Z

7

insert into company (unique_id, company_name)
select 42, 'New Company Name'
from company
where not exists (select 1 from company where unique_id = 42);

See also here for a more general solution: Insert, on duplicate update in PostgreSQL?

edited May 23, 2017 at 12:19

CommunityBot

11 silver badge

answered Dec 16, 2012 at 14:47

user330315

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