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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
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Bottom Line
Use either COUNT(field) or COUNT(*), and stick with it consistently, and if your database allows COUNT(tableHere) or COUNT(tableHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those ...
How to insert values into C# Dictionary on instantiation?
... LastName="Salimzianova", ID=317}},
{ 113, new StudentName {FirstName="Andy", LastName="Ruth", ID=198}}
};
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How do I get a background location update every n minutes in my iOS application?
... location update every n minutes in my iOS application. I'm using iOS 4.3 and the solution should work for non-jailbroken iPhones.
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for each loop in Objective-C for accessing NSMutable dictionary
I am finding some difficulty in accessing mutable dictionary keys and values in Objective-C.
7 Answers
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How to display gpg key details without importing it?
I have a copy of the postgresql apt repository gpg key and would like to view the details of the gpg key as it comes in the file. Is this possible without importing it into a key ring?
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Get the Highlighted/Selected text
...be gained by involving jQuery since you need nothing other than the window and document objects.
function getSelectionText() {
var text = "";
if (window.getSelection) {
text = window.getSelection().toString();
} else if (document.selection && document.selection.type != "...
How to print pandas DataFrame without index
... is nice, however it does not contain the tab-sep anymore which is than a handicap when copying to excel
– Rockbar
Oct 5 '17 at 12:30
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How to pretty print XML from the command line?
... /></root>' |
xmllint --format -
Perl's XML::Twig
This command comes with XML::Twig perl module, sometimes xml-twig-tools package:
echo '<root><foo a="b">lorem</foo><bar value="ipsum" /></root>' |
xml_pp
xmlstarlet
This command comes with xmlstar...
What does 'var that = this;' mean in JavaScript?
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@El Ronnoco, but "He's got gray hair and a scraggly beard and his manner brings to mind a grumpy old man who yells at kids to get off of his lawn." - blogging.compendiumblog.com/blog/software-for-humans/0/0/… ;-p
– David Murdoch
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Putting uncommitted changes at Master to a new branch by Git
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You can just checkout to the test branch and then commit. You don't lose your uncommited changes when moving to another branch.
Supposing you are at the master branch:
git checkout test
git add .
git add deletedFile1
git add deletedFile2
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git commit -m "My Cust...