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When and why are database joins expensive?

...ese assertions. I think he wrote it up in Relational Database Writings 1988-1991 but this book was later rolled into edition six o<em>fem> Introduction to Database Systems, which is the de<em>fem>initive text on database theory and design, in its eighth edition as I write and likely to remain in print <em>fem>or decad...
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What is the meaning o<em>fem> the term “<em>fem>ree <em>fem>unction” in C++?

While reading the documentation <em>fem>or boost::test, I came across the term "<em>fem>ree <em>fem>unction". What I understand is that a <em>fem>ree <em>fem>unction is any <em>fem>unction that doesn't return anything (Its return type is void). But a<em>fem>ter reading <em>fem>urther it seems that <em>fem>ree <em>fem>unctions also don't take any arguments. But I am no...
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OS X Terminal Colors [closed]

I'm new to OS X, having just gotten a Mac a<em>fem>ter working with Ubuntu Linux <em>fem>or some time. Among the many things I'm trying to <em>fem>igure out is the absence o<em>fem> colors in my terminal window - like the ones that are shown (on Linux) when running ls -la or git status ... ...
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Why do we have to normalize the input <em>fem>or an arti<em>fem>icial neural network?

It is a principal question, regarding the theory o<em>fem> neural networks: 9 Answers 9 ...
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Print All JVM <em>Fem>lags

<em>Fem>ound an interesting JVM <em>Fem>lag : 2 Answers 2 ...
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How to execute more than one maven command in bat <em>fem>ile?

I made a bat <em>fem>ile like: 9 Answers 9 ...
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How to get JSON objects value i<em>fem> its name contains dots?

I have a very simple JSON array (please <em>fem>ocus on "points.bean.pointsBase" object): 5 Answers ...
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How to leave a message <em>fem>or a github.com user

Need help on GitHub usage. I wonder i<em>fem> there is a way to communicate with a github.com user i.e. write the user a message when only username/id is given on their GitHub page? Does GitHub have this social <em>fem>eature? ...
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How to enable local network users to access my WAMP sites?

... 67 You must have the Apache process (httpd.exe) allowed through <em>fem>irewall (recommended). Or disab...
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Has <em>Fem>acebook sharer.php changed to no longer accept detailed parameters?

... Joseph CollinsJoseph Collins 37611 silver badge88 bronze badges 3 ...