I’ve used PostgreSQL for almost 20 years. During this time, I’ve struggled with its official clients. Normally, I have a good memory (except for people’s names and faces). So having to refer to the tool documentation each time I wanted to use it was very unusual for me. So I asked myself, why is that so? I noticed that there was inconsistency and even incompatibility among flags. Sometimes you need the -d flag for the database name.