php将数据库查询结果转换为json格式解决思路

include_once 'DB_connmssql.php';
header("Content-Type:text/html;charset=utf-8");

		$sql_initbest="
		select outdate,SUM(nb*endprice) sales from BI_sale
where endprice<>0
group by outdate";
		$query = mssql_query($sql_initbest);
		
		while($row=mssql_fetch_array($query)){
			
		array_push($result["data"] , $row);
		}
			
		
		echo json_encode($result);
		
?>

while($row=mssql_fetch_array($query)){
    $result["data"][] = array(  strtotime($row["outdate"]).'000', $row["sales"] );
}
echo json_encode($result);