No I didn't. It's funny (to me) not solely because I know what SQL injection is, since there's nothing inherently funny (to me) about SQL injection. It's the setting, the "characters" (such as they are), the conversation. "Little Bobby Tables, we call him," for example, is (to me) an amusingly colloquial interjection in itself, ironic in what would probably otherwise be a dry analysis of SQL injection, as is her stereotypically mom-like admonishment.
Just don't expect everyone to agree with you.
I don't. That's why I don't go around saying "this isn't funny" as if it's an objective fact and getting all uppity because other people like things I don't*.
*except for Jersey Shore, because that is just shit.