大约有 42,000 项符合查询结果（耗时：0.0560秒） [XML]
What does it mean by select 1 from table?
...ver, common enough to be noted, even if it isn't really meaningful (that said, I will use it because others use it and it is "more obvious" immediately. Of course, that might be a viscous chicken vs. egg issue, but I don't generally dwell)).
SELECT * FROM TABLE1 T1 WHERE EXISTS (
SELECT 1 FRO...
How can I do width = 100% - 100px in CSS?
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Modern browsers now support the:
width: calc(100% - 100px);
To see the list of supported browser versions checkout: Can I use calc() as CSS unit value?
There is a jQuery fallback: css width: calc(100% -100px); alternative using jquery
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mysql query order by multiple items
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SELECT id, user_id, video_name
FROM sa_created_videos
ORDER BY LENGTH(id) ASC, LENGTH(user_id) DESC
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Ordering by specific field value first
...D function.
If you want complete sorting for all possible values:
SELECT id, name, priority
FROM mytable
ORDER BY FIELD(name, "core", "board", "other")
If you only care that "core" is first and the other values don't matter:
SELECT id, name, priority
FROM mytable
ORDER BY FIELD(name, "core") DE...
Get names of all keys in the collection
...resulting collection so as to find all the keys:
db[mr.result].distinct("_id")
["foo", "bar", "baz", "_id", ...]
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REST API - why use PUT DELETE POST GET?
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The idea of REpresentational State Transfer is not about accessing data in the simplest way possible.
You suggested using post requests to access JSON, which is a perfectly valid way to access/manipulate data.
REST is a methodo...
Twig ternary operator, Shorthand if-then-else
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{{ (ability.id in company_abilities) ? 'selected' : '' }}
The ternary operator is documented under 'other operators'
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Primary key/foreign Key naming convention [closed]
...wo FK columns can't be named the same... e.g., EmployeeTable with EmployeeId PK, SupervisorId FK, MentorId Fk, PartnerId FK, etc. etc...
– Charles Bretana
Sep 2 '09 at 19:31
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Use numpy array in shared memory for multiprocessing
...lready given are good, there is a much easier solution to this problem provided two conditions are met:
You are on a POSIX-compliant operating system (e.g. Linux, Mac OSX); and
Your child processes need read-only access to the shared array.
In this case you do not need to fiddle with explicitly ...
Custom Drawable for ProgressBar/ProgressDialog
Reading the limited documentation that Google has provided, I get the feeling that it is possible to change the look (drawable) of a ProgressBar/ProgressDialog by simply creating a new style an assigning it to the style property of the ProgressBar. But I cannot get this to work properly. Here is wha...