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Oracle SELECT TOP 10 records
I have an big problem with an SQL Statement in Oracle. I want to select the TOP 10 Records ordered by STORAGE_DB which aren't in a list from an other select statement.
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java.net.ConnectException: Connection refused
...
This exception means that there is no service listening on the IP/port you are trying to connect to:
You are trying to connect to the wrong IP/Host or port.
You have not started your server.
Your server is not listening for connections.
On Windows servers, the listen backlog queue is f...
What do people find difficult about C pointers? [closed]
...started working with them, the biggest problem I had was the syntax.
int* ip;
int * ip;
int *ip;
are all the same.
but:
int* ip1, ip2; //second one isn't a pointer!
int *ip1, *ip2;
Why? because the "pointer" part of the declaration belongs to the variable, and not the type.
And then derefe...
Why does String.valueOf(null) throw a NullPointerException?
...s
How does polymorph ambiguity distinction work?
Which overload will get selected for null in Java?
Moral of the story
There are several important ones:
Effective Java 2nd Edition, Item 41: Use overloading judiciously
Just because you can overload, doesn't mean you should every time
They ...
Checking network connection
...or as err:
return False
Currently, 216.58.192.142 is one of the IP addresses for google.com. Change http://216.58.192.142 to whatever site can be expected to respond quickly.
This fixed IP will not map to google.com forever. So this code is
not robust -- it will need constant maintenanc...
Grant **all** privileges on database
...ly you are in database db_name and then execute the commands like create , select and insert operations.
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HTTPS setup in Amazon EC2
... of your project
On Load Balancer Protocol add Http and Https
Next > Select exiting security group
Choose the security group that you have create in the previous step
Next > Choose certificate from ACM
Select the certificate of the step 1
Next >
on Health check i've used the ping p...
如何设置squid使外网也可以通过代理服务器上网，并且使用代理服务器的ip地...
...外网也可以通过代理服务器上网，并且使用代理服务器的ip地址按照配置文件内网可以通过服务器上网，显示的ip是本机ip，外网不能通过服务器，现在想让外网可以通过代理服务器，并且使用服务器的ip，请问...按照配置文件内...
Configure Flask dev server to be visible across the network
...annot access it from other machines on the network (with http://[dev-host-ip]:5000 ). With Rails in dev mode, for example, it works fine. I couldn't find any docs regarding the Flask dev server configuration. Any idea what should be configured to enable this?
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How do I connect to this localhost from another computer on the same network?
...ing for a computer. So it will try to resolve the name symfony.local to an IP address. It will do this by first looking into the hosts file on your computer to see if he can match an IP address to what you typed in the address bar. If it can't, then it will ask DNS servers. The trick here is to appe...