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difference between primary key and unique key

... @android A PK with more than one column acts as a single column with respect to the uniqueness. In PostgreSQL at least, this means that a new column (with default name [table_name]_pkey) is added to the table (I've heard this ...
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What is a race condition?

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How do I start a program with arguments when debugging?

... Don't forget speech marks around command arguments containing spaces, that caught me out. – Dale Jan 22 '18 at 14:53 ...
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Naming convention for utility classes in Java

...onsistency once where the speaker put up a slide showing an outline of his speech with three main points, labeled "1", "2nd", and "C".) Never ever ever make two names that differ only in some subtlety of spelling, like having a CustomerUtil and a CustomerUtility. If there was a good reason to make ...
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What's the difference between a proxy server and a reverse proxy server? [closed]

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What's the best UML diagramming tool? [closed]

...lved nicely since. Works great on any Eclipse-enabled platform. Free as in speech and beer :) As for the diagramming tool Dia, it's quite ugly (interface and resulting drawings), but it does get the job done. An interesting modeling tool free alternative is Umbrello, but I haven't really used it mu...
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Artificially create a connection timeout error

...at worked for me too. emu's solution gave me me an UnknownHostException on Android. – Barry Fruitman Feb 26 '16 at 23:39 2 ...
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GROUP BY to combine/concat a column [duplicate]

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difference between collection route and member route in ruby on rails?

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Citing the author of a blockquote using Markdown syntax

...ere I'm perfectly happy to ignore their recommendations. Given that spoken speeches, not just publications, can be typically cited in an academic work, I'm comfortable calling that a citation on the web too. – ceejayoz Sep 8 '12 at 16:43 ...