public function build()
{
$ret = 'DELETE ' . OptionsArray::build($this->options);
if ($this->columns != NULL && count($this->columns) > 0) {
$ret .= ' ' . ExpressionArray::build($this->columns);
}
if ($this->from != NULL && count($this->from) > 0) {
$ret .= ' FROM ' . ExpressionArray::build($this->from);
}
if ($this->using != NULL && count($this->using) > 0) {
$ret .= ' USING ' . ExpressionArray::build($this->using);
}
if ($this->where != NULL && count($this->where) > 0) {
$ret .= ' WHERE ' . Condition::build($this->where);
}
if ($this->order != NULL && count($this->order) > 0) {
$ret .= ' ORDER BY ' . ExpressionArray::build($this->order);
}
if ($this->limit != NULL && strlen($this->limit) > 0) {
$ret .= ' LIMIT ' . Limit::build($this->limit);
}
return $ret;
}