New posts in Upsert

Concurrent transactions result in race condition with unique constraint on insert

PostgreSQL Upsert not working on Partitioned Table

'Column reference is ambiguous' when upserting element into table

PostgreSQL UPSERT issue with NULL values

ON CONFLICT ON CONSTRAINT fails saying constraint doesn't exist

How to get the ID of the conflicting row in upsert?

Separate stored procedures for inserts and updates?

INSERT INTO without duplicates

How to use sfdx force:data:bulk:upsert on an object without an external ID?

updating a records using external Id in Apex