public function toString()
{
if ($this->from->isEmpty()) {
return '';
}
return "UPDATE " . $this->from->toString() . $this->set->toString() . $this->where->toString() . $this->limit->toString();
}
public function toString()
{
return $this->select->toString() . ($this->from->isEmpty() ? '' : "FROM " . $this->from->toString()) . $this->where->toString() . $this->groupBy->toString() . $this->having->toString() . $this->orderBy->toString() . $this->limit->toString();
}