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COUNT DISTINCT with CONDITIONS

I want to count the number of distinct items in a column subject to a certain condition, for example if the table is like this: ...
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What exactly does the Access-Control-Allow-Credentials header do?

I'm trying to understand how to use CORS and am confused about what the Access-Control-Allow-Credentials header does. 1 A...
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When applying a patch is there any way to resolve conflicts?

... To generate your patch do the following: git format-patch --stdout first_commit^..last_commit > changes.patch Now when you are ready to apply the patches: git am -3 < changes.patch the -3 will do a three-way merge if there are ...
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Mysql adding user for remote access

I created user user@'%' with password 'password . But I can not connect with: 3 Answers ...
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Differences between git pull origin master & git pull origin/master

What is the difference between git pull origin master and git pull origin/master ? 3 Answers ...
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Using :after to clear floating elements

...have a list and the li's have a float:left; . The contents after the <ul> should be aligned correctly. Therefore i can build the following: ...
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Disable file preview in VS2012

In VS2012 when you select a file in solution explorer it automatically opens file in a special "preview" tab. 5 Answers ...
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How do I reword the very first git commit message?

... of pointing to a specific commit) This way, the first commit is also included and you can just reword it like any other commit. The --root option was introduced in Git v1.7.12 (2012). Before then the only option was to use filter-branch or --amend, which is typically harder to do. Note: see also...
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How to align texts inside of an input?

For all default inputs, the text you fill starts on the left. How do you make it start on the right? 7 Answers ...
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Where can I find a NuGet package for upgrading to System.Web.Http v5.0.0.0?

Just upgraded an ASP.NET MVC4 project to use Unity.WebApi version 5.0.0.0 and it requires System.Web.Http v 5.0.0.0 as per the following error: ...