问题
I need to convert a datetime stamp to Unix time. I understand that this is not the easiest thing to do nor a common thing to do, but I need to do it. I have been searching for how to do this for a few hours.
回答1:
It turns out that you can use datediff("s", date("1970-01-01 00:00:00"), {date_column}) to get the unix time stamp in Crystal.
来源：https://stackoverflow.com/questions/20435775/how-to-convert-datetime-stamp-to-unix-time-in-crystal-reports