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Is it a good idea to index datetime field in mysql?

I am working on designing a large database. In my application I will have many rows for example I currently have one table with 4 million records. Most of my queries use datetime clause to select data. Is it a good idea to index datetime fields in mysql database? ...
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Remove non-numeric characters (except periods and commas) from a string

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In C++, if throw is an expression, what is its type?

I picked this up in one of my brief forays to reddit: 4 Answers 4 ...
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How do I import the Django DoesNotExist exception?

I'm trying to create a UnitTest to verify that an object has been deleted. 6 Answers 6...
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How to attach my repo to heroku app

I create a heroku app and then my machine crashed. I have a new machine. How do I attach my existing app to heroku app. When I visit heroku page the url for my app is like this ...
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Remove menu and status bars in TinyMCE 4

I am trying to remove the menu and status bars from TinyMCE 4 because I want to setup a very basic editor. Is this possible? ...
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How do you remove the root CA certificate that fiddler installs

Fiddler helpfully offers to add a unique root CA certificate to intercept HTTPS traffic. 4 Answers ...
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MySQL Fire Trigger for both Insert and Update

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How can I find out a file's MIME type (Content-Type)?

Is there a way to find out the MIME type (or is it called "Content-Type"?) of a file in a Linux bash script? 5 Answers ...
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svn : how to create a branch from certain revision of trunk

The following action will only create a branch from the head revision of the trunk. How do I create a branch from a specific revision? Thanks. ...