大约有 46,000 项符合查询结果（耗时：0.0664秒） [XML]
How to add column if not exists on PostgreSQL?
...ill this cause an access lock on the table (and thus require a maintenance window when run on huge tables in production databases)?
– Hassan Baig
Jul 6 '19 at 17:20
4
...
java.net.ConnectException: Connection refused
... not started your server.
Your server is not listening for connections.
On Windows servers, the listen backlog queue is full.
share
|
improve this answer
|
follow
...
Oracle: how to UPSERT (update or insert into a table?)
...
The issue is that you have a window in between the insert and the update where another process could successfully fire a delete. I did however use this pattern on a table that never has deletes fired against it.
– chotchki
...
How to create a backup of a single table in a postgres database?
...
If you prefer a graphical user interface, you can use pgAdmin III (Linux/Windows/OS X). Simply right click on the table of your choice, then "backup". It will create a pg_dump command for you.
share
|
...
SQLite error 'attempt to write a readonly database' during insert?
...
I got the same error from IIS under windows 7. To fix this error i had to add full control permissions to IUSR account for sqlite database file. You don't need to change permissions if you use sqlite under webmatrix instead of IIS.
...
How do I reformat HTML code using Sublime Text 2?
... }
If your file is not saved (e.g. you just pasted in a snippet to a new window), you can manually set the language for indentation by selecting the menu View → Syntax → language of choice before selecting the reindent option.
...
How to retrieve a single file from a specific revision in Git?
...
In Windows, with Git Bash:
in your workspace, change dir to the folder where your file lives
git show cab485c83b53d56846eb883babaaf4dff2f2cc46:./your_file.ext > old.ext
...
How to scroll to an element inside a div?
... start + change * easeInOutQuad(t);
if( t < 1 )
window.requestAnimationFrame(animateScroll);
else
onDone && onDone();
};
animateScroll();
}
function easeInOutQuad(t){ return t<.5 ? 2*t*t : -1+(4-2*t)*t };
.box{ width:80%; b...
querySelector search immediate children
...); // use native code for other selectors
}
}
});
}
})(window.document, Element.prototype);
Usage
node.querySelector(':scope > someselector');
node.querySelectorAll(':scope > someselector');
For historical reasons, my previous solution
Based on all answers
// Cauti...
Error java.lang.OutOfMemoryError: GC overhead limit exceeded
... System.out.printf("Done.%n");
}
}
Using Java 1.6.0_24-b07 on a Windows 7 32 bit.
java -Xloggc:gc.log GarbageCollector
Then look at gc.log
Triggered 444 times using BAD method
Triggered 666 times using WORSE method
Triggered 354 times using BETTER method
Now granted, this is not t...