code: def select_raw(self, expression, bindings=None):
          
          self.add_select(QueryExpression(expression))
  
          if bindings:
              self.add_binding(bindings, "select")
  
          return self
docs: Add a new raw select expression to the query
  
          :param expression: The raw expression
          :type expression: str
  
          :param bindings: The expression bindings
          :type bindings: list
  
          :return: The current QueryBuilder instance
          :rtype: QueryBuilder