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Nullable Foreign Key bad practice?

Let's say you have a table Orders with a foreign key to a Customer Id. Now, suppose you want to add an Order without a Customer Id, (whether that should be possible is another question) you would have to make the foreign key NULL... Is that bad practice or would you rather work with a link table bet...
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iterating over and removing from a map [duplicate]

...follow | edited Jul 16 at 15:28 Klesun 6,39844 gold badges3232 silver badges3434 bronze badges ...
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How do I undo 'git add' before commit?

I mistakenly added files to Git using the command: 36 Answers 36 ...
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What C++ Smart Pointer Implementations are available?

...ted a lot of comments about some specific smart pointer implementations so it seemed worth starting a new post. 3 Answers ...
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AJAX in Chrome sending OPTIONS instead of GET/POST/PUT/DELETE?

...are many) are sent using OPTIONS instead of whatever defined method I give it. Technically my requests are "cross domain." The site is served on localhost:6120 and the service I'm making AJAX requests to is on 57124. This closed jquery bug defines the issue, but not a real fix. ...
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What is the “right” JSON date format?

... JSON itself does not specify how dates should be represented, but JavaScript does. You should use the format emitted by Date's toJSON method: 2012-04-23T18:25:43.511Z Here's why: It's human readable but also succinct It sorts...
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Does Python optimize tail recursion?

I have the following piece of code which fails with the following error: 6 Answers 6 ...
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Why use pointers? [closed]

I know this is a really basic question, but I've just started with some basic C++ programming after coding a few projects with high-level languages. ...
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Why can't I use the 'await' operator within the body of a lock statement?

The await keyword in C# (.NET Async CTP) is not allowed from within a lock statement. 8 Answers ...
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What's the purpose of the LEA instruction?

For me, it just seems like a funky MOV. What's its purpose and when should I use it? 16 Answers ...