Hello. I need to sync two PostgreSQL databases (some tables from development db to production db) sometimes. So I came up with this script: [...] pg_dump -a -F tar -t table1 -t table2 -U user1 dbname1 | \ pg_restore -a -U user2 -d dbname2 [...] The problem is that this works just for newly added rows. When I edit non-PK column I get constraint error and row isn't updated. For each dumped row I need to check if it exists in destination database (by PK) and if so delete it before INSERT/COPY. Thanks for your advice. (Previously posted on stackoverflow.com, but IMHO this is better place for this question).