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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]

... | edited Mar 1 '19 at 9:20 Piotr Dobrogost 36.5k3232 gold badges209209 silver badges336336 bronze badges ...
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Benefits of EBS vs. instance-store (and vice-versa) [closed]

...ance. Architecting that way helps to get a real HA system. See also stu.mp/2011/04/the-cloud-is-not-a-silver-bullet.html – Jim Soho Jun 11 '11 at 11:34 2 ...
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Relatively position an element without it taking up space in document flow

...re both in a container – Alex H Feb 20 '17 at 6:24 @AlexH Unfortunately, this method does not offer a way to do that. ...
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What is the difference between a symbolic link and a hard link?

...r user. – Martin York Feb 14 '15 at 20:06  |  show 16 more c...
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How to set a Timer in Java?

...ress that. – andrewmu Feb 23 '13 at 20:29 1 @ErnestasGruodis The core APIs list the constructor a...
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What is the difference between a weak reference and an unowned reference?

... | edited Jul 1 at 20:50 Ayova 344 bronze badges answered Sep 24 '14 at 19:43 ...
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Android splash screen image sizes to fit all devices

... Disclaimer This answer is from 2013 and is seriously outdated. As of Android 3.2 there are now 6 groups of screen density. This answer will be updated as soon as I am able, but with no ETA. Refer to the official documentation for all the densities at the m...
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Why use getters and setters/accessors?

... LBushkinLBushkin 117k3030 gold badges204204 silver badges254254 bronze badges 61 ...
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Difference between classification and clustering in data mining? [closed]

...ow the number of classes. – D1X Aug 20 '17 at 12:57 5 @D1X True. That's what this answer says.. (...
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Curly braces in string in PHP

...here. – Gabriel Magana Feb 1 '12 at 20:41 9 For literal curlies, double them up, e.g. $vars='x:3,...