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Nested select statement in SQL Server
...] (subquery)
WHERE [NOT] EXISTS (subquery)
Check for more subquery rules and subquery types.
More examples of Nested Subqueries.
IN / NOT IN – This operator takes the output of the inner query after the inner query gets executed which can be zero or more values and sends it to the outer query...
Is there a shortcut to make a block comment in Xcode?
I'm writing ANSI-compatible C code, and hence I can't use the line ( // ) comment. I'm using Xcode. In Sublime Text and Eclipse, and I think most other IDEs, there are separate keyboard shortcuts for line comments and block comments ( /**/ ). However, I don't see that in Xcode - in fact, I don't eve...
What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?
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SET XACT_ABORT ON instructs SQL Server to rollback the entire transaction and abort the batch when a run-time error occurs. It covers you in cases like a command timeout occurring on the client application rather than within SQL Server itself (which isn't covered by the default XACT_ABORT OFF setti...
When is the init() function run?
....")
}
}
AnswerToLife() is guaranteed to run before init() is called, and init() is guaranteed to run before main() is called.
Keep in mind that init() is always called, regardless if there's main or not, so if you import a package that has an init function, it will be executed.
Additionally,...
How to re-sync the Mysql DB if Master and slave have different database incase of Mysql replication?
... master:
RESET MASTER;
FLUSH TABLES WITH READ LOCK;
SHOW MASTER STATUS;
And copy the values of the result of the last command somewhere.
Without closing the connection to the client (because it would release the read lock) issue the command to get a dump of the master:
mysqldump -u root -p --al...
How to install the current version of Go in Ubuntu Precise
...e GVM for managing my Go versions in my Ubuntu box. Pretty simple to use, and if you're familiar with RVM, it's a nobrainer. It allows you to have multiple versions of Go installed in your system and switch between whichever version you want at any point in time.
Install GVM with:
sudo apt-get i...
'Static readonly' vs. 'const'
I've read around about const and static readonly fields. We have some classes which contain only constant values. They are used for various things around in our system. So I am wondering if my observation is correct:
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ASP.NET MVC A potentially dangerous Request.Form value was detected from the client when using a cus
...hat the DefaultModelBinder first checks if request validation is required and then calls the bindingContext.UnvalidatedValueProvider.GetValue() method with a parameter that indicates if validation is required or not.
Unfortunately we can’t use any of the framework code because it’s sealed, pri...
AddBusinessDays and GetBusinessDays
... For the second one, one solution is to take the difference between date and date+days. This is nice in that it guarantees that the two functions will sync properly, and it removes redundancy.
– Brian
Jun 25 '09 at 16:20
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Why .NET String is immutable? [duplicate]
...ow, String is immutable. What are the reasons for String being immutable and the introduction of StringBuilder class as mutable?
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