What the title says. Since "SQL" is pronounced "es kju el", it starts with a spoken vowel, so the indefinite article is "an".
One examples source: https://en.wikipedia.org/wiki/Article_(grammar)#Indefinite_article
Many people pronounce it "sequel", which would make starting with "A" correct.
https://en.wikipedia.org/wiki/SQL
https://english.stackexchange.com/a/7234
There is no standard and it's a matter of preference, so if Don pronounces it as a word not an abbreviation, I guess he's not going to change it. Not that he's probably worried about the grammar of Easter eggs...
@Fabian42
the real easter egg was omitting the "n", and you have successfully found it. 馃槈馃憤
thank you for your help and best regards.
Why "wontfix"?
Most helpful comment
Many people pronounce it "sequel", which would make starting with "A" correct.
https://en.wikipedia.org/wiki/SQL
https://english.stackexchange.com/a/7234
There is no standard and it's a matter of preference, so if Don pronounces it as a word not an abbreviation, I guess he's not going to change it. Not that he's probably worried about the grammar of Easter eggs...