This command lists all variables (with their IDs) for the quest with the specified ID.
showquestvars [quest id]
|Quest ID||The ID of the quest you wish to receive a list of variables from.|
SQV has the same function as the ShowQuestVars command, it is an alias (shorter version).
The above command would list all variables for the quest with ID 'CR07', which is named "Escaped Criminal".