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Postgres: How to do Composite keys?
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Your compound PRIMARY KEY specification already does what you want. Omit the line that's giving you a syntax error, and omit the redundant CONSTRAINT (already implied), too:
CREATE TABLE tags
(
question_id INTEGER NOT NULL,
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What is the difference between instanceof and Class.isAssignableFrom(…)?
... "dynamic" goes without saying :) Other than performance, this is a true difference.
– peterk
Jun 21 '13 at 15:56
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node.js database [closed]
...for any serious application or service development. Learning how Mongo is different from other DBs would be really you should to first if you are still in evaluation stages.
– Samyak Bhuta
Oct 27 '11 at 18:49
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How to build a Debian/Ubuntu package from source?
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If you get the error You must put some 'source' URIs in your sources.list, uncomment the deb-src lines in your /etc/apt/sources.list
– Christian
Aug 21 '18 at 7:00
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module unsafe for SAFESEH image C++
...ted by an earlier version of the compiler. Which of course would be common if you downloaded a binary for opencv_ffmpeg instead of the source. You can turn the linker option off but then you'll still have a CRT version incompatibility that can byte. Rebuild the library from source. – Hans Passant...
How to make a DIV not wrap?
... contains multiple other DIV's. It is asked that these DIV's wouldn't wrap if the browser window is resized to be narrow.
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CFBundleVersion in the Info.plist Upload Error
...ets "confused" and seems to compare your uploaded-app to the version of a DIFFERENT app you've previously uploaded. It's happened to a lot of people, and I've seen it myself a few times
Apple is supposed to be comparing the "CFBundleVersion" (i.e. "Bundle version" not the "Bundle versions string, sh...
What is the easiest/best/most correct way to iterate through the characters of a string in Java?
... plus one for placing the s.length() in the initialization expression. If anyone doesn't know why, it's because that is only evaluated once where if it was placed in the termination statement as i < s.length(), then s.length() would be called each time it looped.
– Denni...
How can I get my webapp's base URL in ASP.NET MVC?
...ckly determine what the root URL is for my ASP.NET MVC application? I.e., if IIS is set to serve my application at http://example.com/foo/bar , then I'd like to be able to get that URL in a reliable way that doesn't involve getting the current URL from the request and chopping it up in some fragil...
Constructor in an Interface?
...n a class are defined for
every implementation of this interface."
"If a define a Interface for this class so that I can have more
classes which implement the message interface, I can only define the
send method and not the constructor"
...these requirements are exactly what abstract cl...