public function from($From)
{
if (!is_array($From)) {
$From = array($From);
}
$Count = count($From);
$i = 0;
for ($i = 0; $i < $Count; ++$i) {
$this->_Froms[] = $this->escapeIdentifier($this->mapAliases($From[$i]));
}
return $this;
}