/**
  * delete line from database
  * @return bool
  */
 public function delete()
 {
     if (!preg_match("/(.*)WHERE(.*)/i", $this->generateQuery())) {
         return false;
     }
     if ($this->selectClass->queryString($this->generateQuery()) == false) {
         return false;
     }
 }
 /**
  * Update the database
  * @return bool
  */
 public function update()
 {
     if ($this->selectClass->queryString($this->generateQuery()) == false) {
         return false;
     }
 }