A subquery is a query within another SQL query. A subquery is also called inner query or inner select and the statement containing a subquery is called an outer query or outer select.
Note
Subqueries must be enclosed within parenthesis,
An ORDER BY cannot be used in a subquery.
The image type ...
#requires -version 4
After trying to run this script in lower version, you will see this error message
.\script.ps1 : The script 'script.ps1' cannot be run because it contained a "#requires" statement at line 1 for Windows PowerShell version 5.0. The version required by the script do...
4.0
#requires -RunAsAdministrator
After trying to run this script without admin privileges, you will see this error message
.\script.ps1 : The script 'script.ps1' cannot be run because it contains a "#requires" statement for running as Administrator. The current Windows PowerShell s...
Google Analytics is used to track user activity on your website or mobile application.
To set up google-analytics on a website you will need to get a snippet of JavaScript code from Google that you embed in the head of each page on your site that you want to track user activity.
Get the code snipp...
The Java programming language (and its runtime) has undergone numerous changes since its release since its initial public release. These changes include:
Changes in the Java programming language syntax and semantics
Changes in the APIs provided by the Java standard class libraries.
Changes in ...
Cucumber uses Gherkin syntax to describe your software's behaviors in structured natural language.
As such Cucumber is not a test framework (a common misunderstanding), but a system documentation framework, not very different from others like Use Case Scenario.
The common misunderstanding is due t...
To install Cucumber for use with Ruby simply use the command
gem install cucumber
Alternatively, if you are using bundler, you can add the following line to your Gemfile
gem 'cucumber'
And then run bundler
bundle install
[I think this belongs in its own topic, Installation. I created tha...
Consider these two pieces of code:
int a = 1000;
int b = a + 1;
and
Integer a = 1000;
Integer b = a + 1;
Question: Which version is more efficient?
Answer: The two versions look almost the identical, but the first version is a lot more efficient than the second one.
The second version is...
In order to begin using WebRTC you need to get camera and microphone permission.For that you need following things:
adapter.js, you can get it from here
A html webpage with a video tag and little bit of js code
The adapter.js is a JavaScript shim for WebRTC, maintained by Google with help fro...
d3.js doesn't have a .off() method to detatch existent event listeners. In order to remove an event handler, you have to set it to null:
d3.select('span').on('click', null)
If the web page a contains phone number you can make a call using your phone's dialer. This code checks for the url which starts with tel: then make an intent to open dialer and you can make a call to the clicked phone number:
public boolean shouldOverrideUrlLoading(WebView view, String url) {
...
You can change property minuteInterval to set the interval displayed by the minutes wheel.
The default value is 1, the maximum value is 30.
let datePicker = UIDatePicker(frame: CGRect(x: 0, y: 0, width: 320, height: 200)
datePicker.minuteInterval = 15
Cassandra will not require users to login using the default configuration. Instead password-less, anonymous logins are permitted for anyone able to connect to the native_transport_port. This behaviour can be changed by editing the cassandra.yaml config to use a different authenticator:
# Allow anon...
By default each user will be able to access all data in Cassandra. You'll have to configuring a different authorizer in your cassandra.yaml to grant individual object permissions to your users.
# Grant all permissions to all users
# authorizer: AllowAllAuthorizer
# Use object permissions manage...
Splatting is done by replacing the dollar-sign $ with the splatting operator @ when using a variable containing a HashTable of parameters and values in a command call.
$MyParameters = @{
Name = "iexplore"
FileVersionInfo = $true
}
Get-Process @MyParameters
Without splatti...
The simplest way to refer to a single cell on the current Excel worksheet is simply to enclose the A1 form of its reference in square brackets:
[a3] = "Hello!"
Note that square brackets are just convenient syntactic sugar for the Evaluate method of the Application object, so technicall...
To save a reference to a cell in a variable, you must use the Set syntax, for example:
Dim R as Range
Set R = ActiveSheet.Cells(3, 1)
later...
R.Font.Color = RGB(255, 0, 0)
Why is the Set keyword required? Set tells Visual Basic that the value on the right hand side of the = is meant to be ...
