/**
* 获得账号总数。
* @return int
*/
public function getTotal()
{
$sSQL = 'SELECT count(*) as total FROM ' . self::TABLE_NAME;
$sSQL .= ' WHERE valid=' . self::STATUS_VALID . ' AND parent=0 Limit 1';
$aResult = u\DB::getOne($sSQL);
$mResult = $aResult === false ? false : $aResult['total'];
return $mResult;
}
