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How to filter SQL results in a has-many-through relation
...greSQL 9.0 on Debian Squeeze with decent RAM and settings.
6.000 students, 24.000 club memberships (data copied from a similar database with real life data.)
Slight diversion from the naming schema in the question: student.id is student.stud_id and club.id is club.club_id here.
I named the queries a...
How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
...ragg or creating a function.
create table countries ( country_name varchar2 (100));
insert into countries values ('Albania');
insert into countries values ('Andorra');
insert into countries values ('Antigua');
SELECT SUBSTR (SYS_CONNECT_BY_PATH (country_name , ','), 2) csv
FROM (SELECT c...
How can I access “static” class variables within class methods in Python?
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edited Dec 2 '12 at 7:34
Pavel Strakhov
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How do you compare two version Strings in Java?
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Is it better practice to use String.format over string Concatenation in Java?
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250
I'd suggest that it is better practice to use String.format(). The main reason is that String....
Check if a value is in an array (C#)
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234
Add necessary namespace
using System.Linq;
Then you can use linq Contains() method
string[...
When should I use GET or POST method? What's the difference between them?
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267
It's not a matter of security. The HTTP protocol defines GET-type requests as being idempotent...
How could the UNIX sort command sort a very large file?
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112
The Algorithmic details of UNIX Sort command says Unix Sort uses an External R-Way merge sorting...
Unit tests vs Functional tests
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257
Unit Test - testing an individual unit, such as a method (function) in a class, with all depen...
Regex group capture in R with multiple capture-groups
...p in the match (and one for the whole match):
> s = c("(sometext :: 0.1231313213)", "(moretext :: 0.111222)")
> str_match(s, "\\((.*?) :: (0\\.[0-9]+)\\)")
[,1] [,2] [,3]
[1,] "(sometext :: 0.1231313213)" "sometext" "0.1231313213"
[2,] "(moretext :...