Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
953 views
in Technique[技术] by (71.8m points)

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?


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

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;

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...