[DB] Upsert
용어를 찾아보자 오늘 회사에서 Upsert란 용어를 알게되어 찾아보게 되었다. https://wiki.postgresql.org/wiki/UPSERT definition 설명을 보면 _" "UPSERT" is a DBMS feature that allows a DML statement's author to atomically either insert a row, or on the basis of the row already existing, UPDATE that existing row instead, while safely giving little to no further thought to concurrency. One of those two outcomes must be guaranteed, ..
2017.03.30