Which are the SQL improvements you are waiting for?

Question

Dealing with SQL shows us some limitations and gives us an opportunity to imagine what could be.

Which improvements to SQL are you waiting for? Which would you put on t

Answer 1

UPSERT or MERGE in PostgreSQL. It's the one feature whose absence just boggles my mind. Postgres has everything else; why can't they get their act together and implement it, even in limited form?