Markus Winand is an SQL expert, a real one who’s not afraid reading the SQL norm. Instead of keeping his discoveries for himself, he shares them on his two excellent websites https://use-the-index-luke.com/ and https://modern-sql.com/.
He also goes on tour with several excellent conf talks. I retranscripted here hisconf talk “The Mother of all Query Languages: SQL in Modern Times”. It’s a short talk that should broaden every developper vision on SQL.
You can watch the video here.