<div>查询当天数据：</div>
<div>$sql = "SELECT id,apmac,devmac,rssi,createtime from sm_rssi WHERE date_format(from_UNIXTIME(createtime),'%Y-%m-%d') = DATE_FORMAT(now(),'%Y-%m-%d')";</div>
<div></div>
<div>查询一周的数据：</div>
<div>$sql = "SELECT *, sum(cost_...
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