The Truncate Class command deletes the records of all the clusters defined as part of the class. By default every class has one cluster associated with the same name. This command acts at lower level then SQL Delete Command.
TRUNCATE CLASS <class-name>
Remove all the record of class "Profile":
TRUNCATE CLASS Profile
To know more about other SQL commands look at SQL commands.
This is a command of the Orient console. To know all the commands go to Console-Commands.