REGEXP_LIKE: Character positioning?

Question

I have the following field:

msg
----
2015-07-22-06.53.32
CIPIRDSR:XQ040 CHANGE
2015-07-22-06.53.42
1
reg

I am trying to extract the datetime only. I was using

WHERE NOT REGEXP_LIKE (msg, '^[[:digit:]]+$')

however, that doesn't quite do it what I want it to. It still returns more than the datetime. Can you help?

Thanks!

Answer 1

如果要提取日期时间，请使用要查找的日期时间格式：

where regexp_like(msg, '^[0-9]{4}-[0-9]{2}-[0-9]{2}-[0-9]{2}[.][0-9]{2}[.][0-9]{2}$')