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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?

... | edited Aug 2 '17 at 10:42 a_horse_with_no_name 399k6969 gold badges612612 silver badges695695 bronze badges ...
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How to percent-encode URL parameters in Python?

... 407 Python 2 From the docs: urllib.quote(string[, safe]) Replace special characters in strin...
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How can we prepend strings with StringBuilder?

... Using the insert method with the position parameter set to 0 would be the same as prepending (i.e. inserting at the beginning). An example is: varStringBuilder.insert(0, "someThing"); It works both for C# and Java ...
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Return Boolean Value on SQL Select Statement

...SELECT CASE WHEN EXISTS ( SELECT * FROM [User] WHERE UserID = 20070022 ) THEN CAST(1 AS BIT) ELSE CAST(0 AS BIT) END share | improve this answer | follow ...
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.NET Process.Start default directory?

... answered Sep 22 '08 at 13:46 Dror HelperDror Helper 28.2k1414 gold badges7676 silver badges127127 bronze badges ...
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Mercurial .hgignore for Visual Studio 2010 projects

Not to be confused with Mercurial .hgignore for Visual Studio 2008 projects 2 Answers ...
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Target elements with multiple classes, within one rule

... Vian EsterhuizenVian Esterhuizen 3,04244 gold badges2222 silver badges3535 bronze badges ...
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How Should I Declare Foreign Key Relationships Using Code First Entity Framework (4.1) in MVC3?

... answered Apr 4 '11 at 20:05 Sergi PapaseitSergi Papaseit 15.2k1414 gold badges5757 silver badges9696 bronze badges ...
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Unresolved external symbol on static class members

...ou can just use the inline specifier (see https://stackoverflow.com/a/11711082/55721) If using older versions of the C++ standard, you must add the definitions to match your declarations of X and Y unsigned char test::X; unsigned char test::Y; somewhere. You might want to also initialize a static...
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What is digest authentication?

... sent. If they match then access is granted, otherwise it can send back a 401 Unauthorized (no login or failed login) or a 403 Forbidden (access denied). Digest authentication is standardized in RFC2617. There's a nice overview of it on Wikipedia: You can think of it like this: Client makes req...