我有几栏:
| Start | END | Duration
2008-06-28 18.03.55 | 2008-10-06 01.33.55 | End - Start
我的代码如下所示:
SELECT theDelivery,
(char(theDelivery) || ' ' || char(current time)) AS Begin,
(char(theDelivery + 100 DAYS) || ' ' || char(current time + 7 HOURS + 30 MINUTES)) AS End
这是我在做减法的想法......但是错了。我知道你不能减去别名'任何想法? ((char(当前时间+7小时+30分钟) - (char(theDelivery + 100 DAYS)))
所以我发现我对char的问题一切都错了。我想出了这个,这正是我想要的:
SELECT theDelivery,
TIMESTAMP(theDelivery, current time) AS Begin
,
TIMESTAMP((theDelivery + 100 DAYS), (current time + 7 HOURS + 30 MINUTES)) AS End,
TIMESTAMP((theDelivery + 100 DAYS), (current time + 7 HOURS + 30 MINUTES)) - TIMESTAMP(theDelivery, current time) AS MyDur
答案 0 :(得分:1)
如果你这样做:
<(>(char(当前时间+7小时+30分钟) - (char(交付+ 100天)))你正在减去字符。你可以尝试:
date(
to_date(
char(current time + 7 HOURS + 30 MINUTES),
'YYYY-MM-DD HH.MI.SS'
)
) -
date(
to_date(
char(theDelivery + 100 DAYS),
'YYYY-MM-DD HH.MI.SS'
)
)
或者在一条线上:
date( to_date( char(current time + 7 HOURS + 30 MINUTES),'YYYY-MM-DD HH.MI.SS' ) ) - date( to_date(char(theDelivery + 100 DAYS),'YYYY-MM-DD HH.MI.SS') )