大约有 40,000 项符合查询结果（耗时：0.0313秒） [XML]
How to use GROUP_CONCAT in a CONCAT in MySQL
... AS NAME
FROM test
GROUP BY ID, NAME
) AS A
GROUP BY ID;
SQL Fiddle: http://sqlfiddle.com/#!2/b5abe/9/0
share
|
improve this answer
|
follow
|
...
MySQL - length() vs char_length()
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to include() all PHP files from a directory?
...
You can use set_include_path:
set_include_path('classes/');
http://php.net/manual/en/function.set-include-path.php
share
|
improve this answer
|
follow
...
Should IBOutlets be strong or weak under ARC?
...rong should be the default and that the developer docs are being updated.
https://twitter.com/_danielhall/status/620716996326350848
https://twitter.com/_danielhall/status/620717252216623104
share
|
...
How do I globally configure RSpec to keep the '--color' and '--format specdoc' options turned on
...
If you use rake to run rspec tests then you can edit spec/spec.opts
http://rspec.info/rails/runners.html
share
|
improve this answer
|
follow
|
...
Get current URL path in PHP [duplicate]
...
<?php
function current_url()
{
$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$validURL = str_replace("&", "&amp", $url);
return $validURL;
}
//echo "page URL is : ".current_url();
$offer_url = current_url();
?>
<?ph...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...
Link to the PEP discussing the new bool type in Python 2.3: http://www.python.org/dev/peps/pep-0285/.
When converting a bool to an int, the integer value is always 0 or 1, but when converting an int to a bool, the boolean value is True for all integers except 0.
>>> int(Fal...
Passing base64 encoded strings in URL
...ximum length, browsers, servers, libraries and other software working with HTTP protocol may define its' own limits. You may take a look at this article: WWW FAQs: What is the maximum length of a URL?
share
|
...
Dealing with commas in a CSV file
...s (CRLF), double quotes, and commas should be enclosed in double-quotes.
http://tools.ietf.org/html/rfc4180
So, to have values foo and bar,baz, you do this:
foo,"bar,baz"
Another important requirement to consider (also from the spec):
If double-quotes are used to enclose fields, then a dou...
How to get the IP address of the docker host from inside a docker container
...meta-data for the host is still available from inside the container.
curl http://169.254.169.254/latest/meta-data/local-ipv4
For example:
$ docker run alpine /bin/sh -c "apk update ; apk add curl ; curl -s http://169.254.169.254/latest/meta-data/local-ipv4 ; echo"
fetch http://dl-cdn.alpinelinux...