大约有 44,700 项符合查询结果(耗时:0.0850秒) [XML]

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Reason for Column is invalid in the select list because it is not contained in either an aggregate f

...pose I have the following table T: a b -------- 1 abc 1 def 1 ghi 2 jkl 2 mno 2 pqr And I do the following query: SELECT a, b FROM T GROUP BY a The output should have two rows, one row where a=1 and a second row where a=2. But what should the value of b show on each of these two...
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how do you push only some of your local git commits?

Suppose I have 5 local commits. I want to push only 2 of them to a centralized repo (using an SVN-style workflow). How do I do this? ...
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Java 7 language features with Android

...lly without any patches. Try-with-resource requires API Level 19+, and NIO 2.0 stuff are missing. If you can't use Java 7 features, see @Nuno's answer on how to edit your build.gradle. The following is for historical interest only. A small part of Java 7 can certainly be used with Android (not...
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How to color System.out.println output? [duplicate]

... 28 No, but there are third party API's that can handle it http://www.javaworld.com/javaworld/java...
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Can (domain name) subdomains have an underscore “_” in it?

...gal to have an underscore in a domain name. Let me quote the standard, RFC 2181, section 11, "Name syntax": The DNS itself places only one restriction on the particular labels that can be used to identify resource records. That one restriction relates to the length of the label and the full...
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Drawing a connecting line between two elements [closed]

... 12 Answers 12 Active ...
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How does C compute sin() and other math functions?

... 22 Answers 22 Active ...
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Utilizing multi core for tar+gzip/bzip compression/decompression

... 323 You can use pigz instead of gzip, which does gzip compression on multiple cores. Instead of us...
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composer: How to find the exact version of a package?

... | edited Nov 21 '16 at 18:09 L S 2,55933 gold badges2727 silver badges4141 bronze badges an...
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Is there a way to create xxhdpi, xhdpi, hdpi, mdpi and ldpi drawables from a large scale image?

...from a large scale image automatically? For example assume that I have a 512x512 image and I want to have different versions of this images for different screen resolutions supported by Android in appropriate folders. ...