S-Q-L without question. * It works in all contexts ("sequel" gets clunky with names like PostgreSQL) * It's not some aircraft company's trademark * MySQL officially states their product's name is My S-Q-L (though they don't mind MySequel, but it's not the real name) * Unlike "ARP" or "BIOS", "SQL" doesn't map to just one pronunciation. "Squeal", "Squirrel", and others are just as "valid" as "Sequel". Frankly, if I ha…
In the US, this is considered legally ok because nobody would confuse an aircraft with a query language. For example, you have Delta airlines and Delta faucet.