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DolphinDB读取数据时,怎么将两列并成一列呢?

使用DolphinDB读取一个表中的数据,具体数据格式如下:

image

现在date和time是单独的两列,我想把date和time合并成一列,显示时间信息,应该怎么办?


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在query语句中使用concatDateTime()函数,具体方法如下:

select concatDateTime(date,time) as datetime,instrument,open,high,low,close from t;

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