MYSQL通过时间进行筛选数据，每分只取最新的一条数据

SELECT id, FROM_UNIXTIME( cen_time, '%Y-%m-%d %H%i' ) minutes, max(cen_time) as date_time,`index`,symbol,cen_time FROM tp_mdapi_stock_trend where symbol='".$game['symbol']."' and date_format(from_unixtime(cen_time),'%Y-%m-%d') = date_format(date_sub(curdate(),interval 1 day),'%Y-%m-%d') GROUP BY minutes order by id

cen_time ：当前数据时间

FROM_UNIXTIME：时间转换，上面精确到分钟