怎么查询一段时间内每天的第一条轨迹 #4594
yigexiaopianzi
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用 first() 和 interval(1d) 可以吗? |
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请问一下TDengine中有 FROM_UNIXTIME()这样的语法吗 , 轨迹表里面有到毫秒的时间戳的列,我要怎么查出指定时间段内的每天的第一条轨迹尼?
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