大约有 44,000 项符合查询结果（耗时：0.0311秒） [XML]
sql ORDER BY multiple values in specific order?
...
You can order by a selected column or other expressions.
Here an example, how to order by the result of a case-statement:
SELECT col1
, col2
FROM tbl_Bill
WHERE col1 = 0
ORDER BY -- order by case-statement
CASE WHEN tbl_Bi...
How to comment out a block of code in Python [duplicate]
...
vim with nerdcommenter. Select the block you want and ,c<space>
– dev_nut
Oct 10 '14 at 22:37
add a comment
...
MySQL - why not index every field?
...k about index updates were one update trigger all indexes update this is a select all unordered equivalent in time
from this I conclude that you have in this scenario that if you will loose this time is preferable to lose it in a select nor an update because if you will select a field that is not i...
Vagrant stuck connection timeout retrying
... the GUI of Virtual box to see that it was waiting for input on startup to select whether I wanted to boot directly to ubuntu or safemode etc.
To turn on the GUI you have to put this in your vagrant config Vagrantfile:
config.vm.provider :virtualbox do |vb|
vb.gui = true
end
...
Wrapping chained method calls on a separate line in Eclipse for Java
...ormatter → Edit → Line wrapping (tab)
Then, in the list at the left, select:
Function Calls → Qualified invocations
Now below this list, set Line wrapping policy to:
Wrap all elements, except first element if not necessary
Check:
Force split, even if line shorter than maximu...
Determine .NET Framework version for dll
... |
Where-Object {$_.AttributeType.Name -eq "TargetFrameworkAttribute" } |
Select-Object -ExpandProperty ConstructorArguments |
Select-Object -ExpandProperty value
You should get something like
.NETFramework,Version=v4.5.2
...
What is an AngularJS directive?
...on.
The ng-model directive binds the value of HTML controls (input,
select, textarea) to application data.
The ng-bind directive binds application data to the HTML view.
<div ng-app="">
<p>Name: <input type="text" ng-model="name"></p>
<p ng-bind="name...
How to get a one-dimensional scalar array as a doctrine dql query result?
...as callback, instead of writing a closure.
$result = $em->createQuery("SELECT a.id FROM Auction a")->getScalarResult();
$ids = array_map('current', $result);
See Petr Sobotka's answer below for additional info regarding memory usage.
PHP >= 5.5
As jcbwlkr's answered below, the rec...
How do I get the n-th level parent of an element in jQuery?
...
this will not work for multiple element selections, a safer way would be: $('.element').first().parents().eq(num);
– zzzzBov
Aug 17 '11 at 13:44
...
Rails find record with zero has_many records associated [duplicate]
..._joins(:photos).where(photos: {id: nil})
which will result in SQL like:
SELECT cities.*
FROM cities LEFT OUTER JOIN photos ON photos.city_id = city.id
WHERE photos.id IS NULL
Using includes:
City.includes(:photos).where(photos: {id: nil})
will have the same result, but will result in much ug...