Now if someone can explain why there would be either reaction to a message consisting entirely of a SQL command I'll be all set.

>In that context I would take it to mean a friendly response from someone who understood your joke and that you were kidding. No sarcasm. Just a smiley face.
>
>
>>>>Hi everybody,
>>>>
>>>>If somebody would say:
>>>>
>>>>"You're such a riot", how this can be interpreted?
>>>>
>>>>Thanks in advance.
>>>
>>>Depends on how they said or wrote it. For example...
>>>
>>>"You're such a riot!" could imply that they are kidding you about something you said or did.
>>>
>>>"You're such a riot." is probably sarcastic and they are not kidding you.
>>>
>>>The context is also important. What else was being said at the time and all that. And who said it and your relationship with them.
>>
>>Here is the exact context
>>
>>http://forums.asp.net/t/1369221.aspx
>>
>>I'm just not sure what would riot mean if applied to the person. I looked it up in Wikipedia, but don't see it as an idiom.