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Postgres: Distinct but only for one column
...l1, col2
from names
This will return any of the rows containing the name. If you want to control which of the rows will be returned you need to order:
select distinct on (name)
name, col1, col2
from names
order by name, col1
Will return the first row when ordered by col1.
distinct on:
SELECT ...
Which gets priority, maxRequestLength or maxAllowedContentLength?
...mum request size supported by ASP.NET, whereas maxAllowedContentLength specifies the maximum length of content in a request supported by IIS. So you need to set both in order to upload large files: the smaller one "takes priority".
(I picked this up from http://forums.iis.net/t/1169846.aspx -- cre...
Relative URLs in WordPress
...domain names, changing between http and https etc. Today I discovered that if you define WP_CONTENT_URL with a relative url then when you insert files into posts they use the relative url for the src instead of absolute url. Just what I've always wanted! But the official WordPress documentation says...
What does the '.' (dot or period) in a Go import statement do?
...
It allows the identifiers in the imported package to be referred to in the local file block without a qualifier.
If an explicit period (.) appears instead of a name, all the package's exported identifiers will be declared in the current fil...
What's an object file in C?
...e not yet found an explanation on what an object file is. What's the real difference between any other compiled file and an object file?
I would be glad if someone could explain in human language.
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Easiest way to split a string on newlines in .NET?
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new[] { Environment.NewLine },
StringSplitOptions.None
);
Edit:
If you want to handle different types of line breaks in a text, you can use the ability to match more than one string. This will correctly split on either type of line break, and preserve empty lines and spacing in the text:
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Java volatile reference vs. AtomicReference
Is there any difference between a volatile Object reference and AtomicReference in case I would just use get() and set() -methods from AtomicReference ?
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Can two Java methods have same name with different return types? [duplicate]
Can two Java methods have the same name with different return type ? The return type of the methods are different and they are declared with the same method's name.
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Correct way to use get_or_create?
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FYI created is a boolean. True if created, False if it is fetched
– Josh
Oct 4 '18 at 8:45
3
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How do I alter the position of a column in a PostgreSQL database table?
... SQL syntax.
One other idea occurs to me: you can define a VIEW that specifies the order of columns how you like it, without changing the physical position of the column in the base table.
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