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SQL order string as number
...olumn value to an integer explicitly with
select col from yourtable
order by cast(col as unsigned)
or implicitly for instance with a mathematical operation which forces a conversion to number
select col from yourtable
order by col + 0
BTW MySQL converts strings from left to right. Examples:
...
Finding duplicate rows in SQL Server
... SELECT orgName, COUNT(*) AS dupeCount
FROM organizations
GROUP BY orgName
HAVING COUNT(*) > 1
) oc on o.orgName = oc.orgName
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Why should a Java class implement comparable?
...r.firstName) : last;
}
}
later..
/**
* List the authors. Sort them by name so it will look good.
*/
public List<Author> listAuthors(){
List<Author> authors = readAuthorsFromFileOrSomething();
Collections.sort(authors);
return authors;
}
/**
* List unique authors. S...
How can I get a side-by-side diff when I do “git diff”?
When I type "git diff", I'd like to see a side-by-side diff, like with "diff -y", or like to display the diff in an interactive diff tool like "kdiff3". How can this be done?
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Select last row in MySQL
...here MAX(id) is the right answer! Kind of:
SELECT fields FROM table ORDER BY id DESC LIMIT 1;
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What is the difference between C, C99, ANSI C and GNU C?
I have started programming practice on codechef and have been confused by the difference between C and C99. What does C mean here? Is it C89? Check the languages at the bottom of this submit . It contains both C and C99.
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is it possible to change values of the array when doing foreach in javascript?
... containing only qualifying entries;
map for making a one-to-one new array by transforming an existing array;
some to check whether at least one element in an array fits some description;
every to check whether all entries in an array match a description;
find to look for a value in an array
and s...
Python group by
...', '9843236'], 'type': 'KAT'}]
It is also possible with itertools.groupby but it requires the input to be sorted first.
>>> sorted_input = sorted(input, key=itemgetter(1))
>>> groups = groupby(sorted_input, key=itemgetter(1))
>>> [{'type':k, 'items':[x[0] for x in v]}...
postgresql list and order tables by size
How can I list all the tables of a PostgreSQL database and order them by size ?
7 Answers
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PHP foreach change original array values
...
In PHP, passing by reference (&) is ... controversial. I recommend not using it unless you know why you need it and test the results.
I would recommend doing the following:
foreach ($fields as $key => $field) {
if ($field['requi...