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简单记录一个常用函数,用来提取当前时间(系统时间)的年月日时分秒数值
select extract(year from systimestamp) as 年
,extract(month from systimestamp) as 月
,extract(day from systimestamp) as 日
,extract(timezone_hour from systimestamp) + 1 as 时
,extract(minute from systimestamp) as 分
,ceil(extract(second from systimestamp)) as 秒
from dual
查询结果如下:
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