Should SQL functions be uppercase or lowercase?

Question

I am new in SQL and I was wondering what is the right way to write the functions. I know the norm for statements like SELECT is uppercase, but what is the norm for functions? I've seen people write them with lowercase and others in uppercase.

Thanks for the help.

Answer 1

There's no norm on that, there are standards, but those can change from company to company.

SQL code is not case sensitive.