protected function createSelect($config = null)
	{
		$config = $config ? $config : $this->config;
		$select = array();
		if( ($columns = $config["columns"]) )
		{
			foreach($columns as $db_key => $export_key)
			{
				$select[]= "{$db_key} as {$export_key}";
			}
		}
		return $select;
	}
protected function createSelect($config = null)
	{
		$config = $config ? $config : $this->config;
		$select = array();
		if( ($columns = $config["columns"]) )
		{
			foreach($columns as $db_key => $export_key)
			{
				$select[]= "{$db_key} as {$export_key}";
			}
		}
		return $select;
	}
protected function createSelect ( $ config = null ) { $ config = $ config ? $ config : $ this -> config ; $ select = array ( ) ; if ( ( $ columns = $ config [ "columns" ] ) ) { foreach ( $ columns as $ db_key => $ export_key ) { $ select [ ] = "{$db_key} as {$export_key}" ; } } return $ select ; }
Create select to make the CsvFile attributes
to export

@return  String
Create select to make the CsvFile attributes to export