Modify studentActivitiesOverview sql #124
Modify studentActivitiesOverview sql #124

Add one more constraint "FKUserId desc" after "order by" so that the query
result will be the same every time, thus we can test the "ascending
order/descending order" cases for this function.

JoeFu/mseproject,JoeFu/mseproject,JoeFu/mseproject,JoeFu/mseproject