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add column to mysql table if it does not exist

...and. It should throw an error if the column already exists. ERROR 1060 (42S21): Duplicate column name 'newcolumnname' Catch the error and disregard it in your upgrade script. share | improve thi...
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Use JNI instead of JNA to call native code?

... 127 JNA does not support mapping of c++ classes, so if you're using c++ library you will need a jn...
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How can I see what has changed in a file before committing to git?

... | edited Aug 22 at 22:41 ijoseph 2,75833 gold badges1919 silver badges2020 bronze badges an...
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Get user profile picture by Id

... 298 http://graph.facebook.com/" + facebookId + "/picture?type=square For instance: http://graph.fa...
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When is CRC more appropriate to use than MD5/SHA1?

... | edited Apr 7 '12 at 23:05 answered Jun 15 '09 at 15:51 ...
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What does the 'L' in front a string mean in C++?

... 92 'L' means wchar_t, which, as opposed to a normal character, requires 16-bits of storage rather t...
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Using Font Awesome icon for bullet points, with a single list item element

... 250 Solution: http://jsfiddle.net/VR2hP/ ul li:before { font-family: 'FontAwesome'; ...
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How to use java.net.URLConnection to fire and handle HTTP requests?

... 2729 First a disclaimer beforehand: the posted code snippets are all basic examples. You'll need t...
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What should I do if the current ASP.NET session is null?

... | edited Jun 20 at 9:12 Community♦ 111 silver badge answered Sep 5 '09 at 8:51 ...
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How to resolve git stash conflict without commit?

... | edited Mar 12 '19 at 19:05 answered Dec 9 '14 at 15:09 ...