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Difference between Key, Primary Key, Unique Key and Index in MySQL
... it is not required for a table to have a PRIMARY KEY it is usually a good idea.
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MetadataException: Unable to load the specified metadata resource
...gh detail in your question to give an accurate answer, but hopefully these ideas should get you on the right track.
Update: I've written a blog post with more complete steps for troubleshooting.
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How do I invoke a Java method when given the method name as a string?
...od = null; solves the problem but mentioning it in the answer is not a bad idea.
– Amin
Feb 14 '16 at 18:14
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Detect iPad users using jQuery?
...|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(di|rc|ri)|mi(o8|oa...
Random data in Unit Tests?
... now longer seems to exist, and Google did not point me anywhere else. Any idea where it is now?
– Raedwald
Sep 8 '11 at 16:18
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Is an HTTPS query string secure?
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Yes, it is. But using GET for sensitive data is a bad idea for several reasons:
Mostly HTTP referrer leakage (an external image in the target page might leak the password[1])
Password will be stored in server logs (which is obviously bad)
History caches in browsers
Therefor...
What is the most frequent concurrency issue you've encountered in Java? [closed]
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There is an IDEA inspection for this called "Synchronization on non-final field unlikely to have useful semantics". Very nice.
– Jen S.
Jan 20 '09 at 16:28
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How do I split a string with multiple separators in javascript?
...bol? Tried variations of (hello world)|\| which didn't quite work yet. Any ideas?
– nutty about natty
May 28 '14 at 20:37
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How to configure postgresql for the first time?
... I downvoted because I think activating the postgres user is a bad idea. stackoverflow.com/a/41604969/124486
– Evan Carroll
Jan 12 '17 at 4:09
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Font size in CSS - % or em?
...isregarding the fact that CSS defines logical pixels, which was a terrible idea based on a undoubtedly hasty decision to accomodate for the onslaught of CSS-capable mobile devices a decade ago, pixels are entirely at browsers and users discretion as far as default font size goes, at least. In additi...