code: function union(NotORM_Result $result, $all = false){
          $this->union[]    = " UNION " . ($all ? "ALL "
                  : "") . ($this->notORM->driver == "sqlite" || $this->notORM->driver == "oci" ? $result : "($result)");
          $this->parameters = array_merge($this->parameters, $result->parameters);
          return $this;
      }
docs: @param NotORM_Result
  @param bool
  
  @return NotORM_Result fluent interface