[MarkusWinand]

I recently covered MERGE on modern-sql.com: https://modern-sql.com/caniuse/merge

There I also look at limitations of some implementations and problems such as not reporting ambiguous column names — just guessing what you mean ;)

[bafe]

Great work as always! I still remember looking at your site when I was working on an ETL system for sensor data and realising in frustration how MariaDB was missing all the nice modern SQL functions like merge.