[英]SQL difference between two rows with timestamp
Im working on with SQL on PostgreSQL I have this table that describes images of cars with columns camera , whn and reg我正在使用 PostgreSQL 上的 SQL 我有这张表,它描述了带有列摄像头、 whn和reg的汽车图像
Camera is int,whn is timestamp string(eg 2007-02-25 07:51:10) and reg is string Camera 是 int,whn 是时间戳字符串(例如 2007-02-25 07:51:10),reg 是字符串
I am doing this assignment and im stuck on:我正在做这个任务,我坚持:
"Print the register plate(reg) of cars which have been photographed twice by the same camera or different and the difference between the photos is a minute or less"
“打印同一台相机或不同相机两次拍摄的汽车的登记牌(reg),照片之间的差异是一分钟或更短”
Does anybody know how i can express this difference between two different rows of the column whn that needs to be equal or less than 60 seconds?有谁知道我如何表达需要等于或小于 60 秒的列的两个不同行之间的这种差异?
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