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Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns on SELECT to G...
How to remove specific element from an array using python
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204
You don't need to iterate the array. Just:
>>> x = ['ala@ala.com', 'bala@bala.com']
&...
Generating all permutations of a given string
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607
public static void permutation(String str) {
permutation("", str);
}
private static void...
R - Markdown avoiding package loading messages
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edited Aug 7 '18 at 21:10
answered Oct 26 '12 at 16:35
Yi...
How do I install an R package from source?
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500
If you have the file locally, then use install.packages() and set the repos=NULL:
install.pa...
WPF text Wrap vs WrapWithOverflow
...brary/…
– blachniet
Aug 26 '12 at 0:17
3
I read this and am still not certain of the difference...
Call a global variable inside module
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410
You need to tell the compiler it has been declared:
declare var bootbox: any;
If you have bet...
Is there a difference between “raise exception()” and “raise exception” without parenthesis?
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edited Jan 30 '15 at 15:25
Aaron Hall♦
260k6969 gold badges353353 silver badges303303 bronze badges
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Remove the bottom divider of an android ListView
...divider disappears.
– Erhannis
Jul 10 '14 at 22:33
1
Use background = @android:color/transparent,...
Adding a new array element to a JSON object
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answered Sep 19 '13 at 1:20
Paul S.Paul S.
55.3k77 gold badges9797 silver badges114114 bronze badges
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