大约有 44,000 项符合查询结果（耗时：0.0311秒） [XML]
In SQL, what's the difference between count(column) and count(*)?
...ow with all NULLs, would count(*) still count it, or is just count(column) for all columns?
– Joel Coehoorn
Sep 12 '08 at 15:29
7
...
Automate ssh-keygen -t rsa so it does not ask for a passphrase
...
To generate a SSH keypair without being prompted for a passphrase you can do the following:
$ ssh-keygen -f id_rsa -t rsa -N ''
share
|
improve this answer
|
...
Cannot issue data manipulation statements with executeQuery()
... answered Apr 15 '19 at 3:46
ForrestForrest
1,0871313 silver badges1212 bronze badges
...
Show/hide 'div' using JavaScript
For a website I'm doing, I want to load one div, and hide another, then have two buttons that will toggle views between the div using JavaScript.
...
How to run an EXE file in PowerShell with parameters with spaces and quotes
...t just evaluates the string, that is, it typically echos it to the screen, for example:
PS> "Hello World"
Hello World
If you want PowerShell to interpret the string as a command name then use the call operator (&) like so:
PS> & 'C:\Program Files\IIS\Microsoft Web Deploy\msdeploy.e...
SCOPE_IDENTITY() for GUIDs?
... a default constraint (you can't explicitly insert using NewSequentialID() for example). As such, I think the vast majority of scenarios where you can use it you should be doing things differently anyway.
– Shiv
May 14 '18 at 0:58
...
Chrome: timeouts/interval suspended in background tabs?
...t . Now I noticed that (as expected) setTimeout is not very accurate but for most appliances not dramatically inaccurate. Now if I run the test in in Chrome and let it run in a background tab (so, switching to another tab and browse on there), returning to the test and inspecting te results (if th...
What is the difference between pluck and collect in Rails?
... an array, without constructing ActiveRecord objects. This means better performance for a large or often-running query.
In addition to @apneadiving's answer, pluck can take both single and multiple column names as argument:
Client.pluck(:id, :name)
# SELECT clients.id, clients.name FROM clients
# ...
How can I change the table names when using ASP.NET Identity?
..., not RC) of Visual Studio 2013 (downloaded from MSDN 2013-10-18) and therefore the latest (RTM) version of AspNet.Identity. When I create a new web project, I select "Individual User Accounts" for authentication. This creates the following tables:
...
AngularJS $resource RESTful example
...ack. You've got some of that in there, but you're not really leveraging it for what it was made to do.
It's fine to have custom methods on your resource, but you don't want to miss out on the cool features it comes with OOTB.
EDIT: I don't think I explained this well enough originally, but $resour...