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Postgresql - change the size of a varchar column to lower length

...ts columns is a varchar(255) and I would like to resize it to a varchar(40) . Basically, I would like to change my column by running the following command: ...
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How to create a HashMap with two keys (Key-Pair, Value)?

... asherbar 3,46833 gold badges2222 silver badges4343 bronze badges answered Feb 3 '13 at 22:25 Tomasz NurkiewiczTo...
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What's the difference between HEAD^ and HEAD~ in Git?

...e-ref failed" if $?; # for browsing history - http://blog.kfish.org/2010/04/git-lola.html system "git config alias.lol 'log --graph --decorate --pretty=oneline --abbrev-commit'"; system "git config alias.lola 'log --graph --decorate --pretty=oneline --abbrev-commit --all'"; It adds aliases in the...
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Regular expression to match a line that doesn't contain a word

...┬──┬───┬──┐ S = │e1│ A │e2│ B │e3│ h │e4│ e │e5│ d │e6│ e │e7│ C │e8│ D │e9│ └──┴───┴──┴───┴──┴───┴──┴───┴──┴───┴──┴───┴──┴───┴──┴...
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select count(*) from table of mysql in php

... Kermit 32.1k1010 gold badges7474 silver badges110110 bronze badges answered Aug 2 '11 at 5:48 Shakti SinghShakti Singh ...
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How to present a simple alert message in java?

... 241 I'll be the first to admit Java can be very verbose, but I don't think this is unreasonable: J...
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Node.js vs .Net performance

...appy (noobs and experts). It got even harder because .NET ended up with 3-4 different patterns for doing async. .NET 4.5 is trying to go back and retrofit the .NET framework to have an opinionated model around async IO, but it may be a while until the frameworks you care about actually support it. ...
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Efficiency of premature return in a function

... edited Oct 25 '11 at 22:14 answered Oct 25 '11 at 4:59 Dan...
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How to get the number of days of difference between two dates on mysql?

...calculation In your case, you'd use : mysql> select datediff('2010-04-15', '2010-04-12'); +--------------------------------------+ | datediff('2010-04-15', '2010-04-12') | +--------------------------------------+ | 3 | +-------------------------------------...
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How can I set the color of a selected row in DataGrid

... | edited Apr 2 '14 at 21:41 Developer 31.4k6868 gold badges266266 silver badges439439 bronze badges ...