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How to concatenate text from multiple rows into a single text string in SQL server?
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If you are on SQL Server 2017 or Azure, see Mathieu Renda answer.
I had a similar issue when I was trying to join two tables with one-to-many relationships. In SQL 2005 I found that XML PATH method can handle the concatenation of the rows very easily.
If there is a table called STUDENTS
Subj...
How to permanently export a variable in Linux?
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You can add it to your shell configuration file, e.g. $HOME/.bashrc or more globally in /etc/environment.
After adding these lines the changes won't reflect instantly in GUI based system's you have to exit the terminal or create a ne...
List of Delphi language features and version in which they were introduced/deprecated
...w language features
not new VCL/FMX features.
Here are the links to the RAD Studio docwiki:
What's new in Rad Studio 10.3 Rio
What's new in Delphi and C++Builder 10.2 Tokyo
What's new in Delphi and C++Builder 10.1 Berlin
What's new in Delphi and C++Builder 10 Seattle
What's new in Delphi an...
C# code to validate email address
What is the most elegant code to validate that a string is a valid email address?
43 Answers
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How do I disable right click on my web page?
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You can do that with JavaScript by adding an event listener for the "contextmenu" event and calling the preventDefault() method:
document.addEventListener('contextmenu', event => event.preventDefault());
That being said: DON'T DO IT.
Why? Because it ach...
How to do version numbers? [closed]
...].[minor].[release].[build]
major: Really a marketing decision. Are you ready to call the version 1.0? Does the company consider this a major version for which customers might have to pay more, or is it an update of the current major version which may be free? Less of an R&D decision and more a...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...as just wrestling with a similar problem myself, but didn't want the overhead of a function. I came up with the following query:
SELECT myfield::integer FROM mytable WHERE myfield ~ E'^\\d+$';
Postgres shortcuts its conditionals, so you shouldn't get any non-integers hitting your ::integer cast. ...
Is it possible to perform a 'grep search' in all the branches of a Git project?
... the branches.
Another form would be:
git rev-list --all | (
while read revision; do
git grep -F 'yourWord' $revision
done
)
You can find even more example in this article:
I tried the above on one project large enough that git complained about the argument size, so if you ru...
How does the extend() function work in jQuery?
...jQuery.extend():
Starts with the object provided by the first parameter.
Adds to it any property in the second parameter. If the property already exists in the first parameter, it is overwritten. The object for the second parameter is unchanged.
Repeats the above with any subsequent parameter.
Ret...
How to configure encoding in Maven?
...on - of course - uses ${project.reporting.outputEncoding} by default. So I added the property as a child element of the project element and everything is fine now:
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputE...