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Oracle Differences between NVL and Coalesce
...the first non-NULL (there are some exceptions, such as sequence NEXTVAL):
SELECT SUM(val)
FROM (
SELECT NVL(1, LENGTH(RAWTOHEX(SYS_GUID()))) AS val
FROM dual
CONNECT BY
level <= 10000
)
This runs for almost 0.5 seconds, since it generates...
How to activate JMX on my JVM for access with jconsole?
...un.management.jmxremote.ssl=false
-Djava.rmi.server.hostname=${DOCKER_HOST_IP}
-Dcom.sun.management.jmxremote.port=9999
-Dcom.sun.management.jmxremote.rmi.port=9998
DOCKER_HOST_IP
Unlike using jconsole locally, you have to advertise a different IP than you'll probably see from within the containe...
How do you connect localhost in the Android emulator? [duplicate]
I have made a php script inside localhost and I am connecting that with httpClient but I am getting a problem.
7 Answer...
Does HTTP use UDP?
...n't generate raw TCP frames (nor UDP ones for that matter) they do have to select the transport to use, and for normal HTTP that's always TCP. The newer QUIC pseudo-protocol does however use UDP.
– Alnitak
Sep 27 '18 at 9:16
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What is the best way to prevent session hijacking?
...bsite for 5 minutes, they'll have to login again
– elipoultorak
Nov 16 '15 at 11:26
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新浪是如何分析处理32亿条实时日志的？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...户在其他方面抱怨更多，如下：
1，用户最先抱怨的是IP解析成地区、ISP信息一点都不准，完全没有参考意义。
如对于CDN这种服务，我们解析用户IP不准，定位问题边缘节点错误，问题没法查，这是帮倒忙。原因：Logstash默认...
Find the host name and port using PSQL commands
...
SELECT *
FROM pg_settings
WHERE name = 'port';
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Node.js EACCES error when listening on most ports
...te that visitors can use by navigating to an easy to use URL like
http://ip:port/
Unfortunately, unless you sign on as root, you’ll normally have to use
a URL like http://ip:port - where port number > 1024.
A lot of people get stuck here, but the solution is easy. There a few
op...
How to remove certain characters from a string in C++?
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how is this not the selected answer?
– user3240688
Dec 20 '17 at 6:49
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SQL query to group by day
...dateadd(DAY,0, datediff(day,0, created)) return '2009-11-02 00:00:00.000'
select sum(amount) as total, dateadd(DAY,0, datediff(day,0, created)) as created
from sales
group by dateadd(DAY,0, datediff(day,0, created))
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