Oracle中以毫秒为单位的时间戳之间的差异
我有表 test1 并且有一列 DOJ,其时间戳数据类型很少,如下所示.这里我需要 doj 和 systimestamp 之间的差异 im 毫秒.
I have table test1 and have one column DOJ with timestamp datatype having few records as shown below. Here i need the difference im milliseconds between doj and systimestamp.
SELECT DOJ FROM TEST1;
DOJ
----------------------------
21-MAR-14 09.25.34.514526000
21-MAR-14 09.25.34.520345000
22-MAR-14 09.25.34.523144000
22-MAR-14 09.25.34.527770000
23-MAR-14 09.25.34.532482000
23-MAR-14 09.25.34.535603000
24-MAR-14 09.25.34.538556000
24-MAR-14 09.25.34.541729000
SELECT SYSTIMESTAMP FROM DUAL;
SYSTIMESTAMP
--------------
24-MAR-14 09.48.10.251556000 +00:00
有人可以帮我解决这个问题吗.
Can some one please help me with this.
推荐答案
select
extract(second from systimestamp - doj) * 1000
from
test1;
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