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Find most frequent value in SQL column
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SELECT `column`,
COUNT(`column`) AS `value_occurrence`
FROM `my_table`
GROUP BY `column`
ORDER BY `value_occurrence` DESC
LIMIT 1;
Replace column and my_table. Increase 1 if you want to see the N most common values of the column.
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How to repeat a “block” in a django template
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Good solution. However, it is "use_macro". "usemacro" is wrong.
– Ramtin
Nov 28 '17 at 11:25
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How do I create a parameterized SQL query? Why Should I?
...= @Baz"
Using cn As New SqlConnection("Your connection string here"), _
cmd As New SqlCommand(sql, cn)
cmd.Parameters.Add("@Baz", SqlDbType.VarChar, 50).Value = Baz
Return cmd.ExecuteScalar().ToString()
End Using
End Function
Stored procedures are sometimes credit...
Where does Jenkins store configuration files for the jobs it runs?
...y different EC2 instance at any point. We have a bunch of Puppet manifests allowing us to easily reinstall the software on the EC2 instance, but custom configuration files, like the ones for the jobs I create in Jenkins, would be deleted after the move.
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Math - mapping numbers
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If your number X falls between A and B, and you would like Y to fall between C and D, you can apply the following linear transform:
Y = (X-A)/(B-A) * (D-C) + C
That should give you what you want, although your question is a little ambigu...
How to extract img src, title and alt from html using php? [duplicate]
I would like to create a page where all images which reside on my website are listed with title and alternative representation.
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JavaScript property access: dot notation vs. brackets?
...n't be used with dot notation:
var foo = myForm.foo[]; // incorrect syntax
var foo = myForm["foo[]"]; // correct syntax
including non-ASCII (UTF-8) characters, as in myForm["ダ"] (more examples).
Secondly, square bracket notation is useful when dealing with
property names which vary in a pre...
Find mouse position relative to element
...ition, and then subtract it from the parent element's offset position.
var x = evt.pageX - $('#element').offset().left;
var y = evt.pageY - $('#element').offset().top;
If you're trying to get the mouse position on a page inside a scrolling pane:
var x = (evt.pageX - $('#element').offset().left) + s...
hash function for string
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@Josepas the hash function should ideally return a size_t or other such unsigned value (such as the unsigned long in this code). The caller is responsible for taking modulo of the result to fit it to the hash table. The caller controls the table slot being hashed to; not the func...
How can I have ruby logger log output to stdout as well as file?
...g.log", "a")
Logger.new MultiIO.new(STDOUT, log_file)
Every time Logger calls puts on your MultiIO object, it will write to both STDOUT and your log file.
Edit: I went ahead and figured out the rest of the interface. A log device must respond to write and close (not puts). As long as MultiIO re...