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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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How to add Options Menu to Fragment in Android

....MenuInflater; instead of import android.support.v4.view.MenuInflater; and now all is working – misterbassman Nov 29 '11 at 10:53 185 ...
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Splitting a string into chunks of a certain size

...meone that just wants to look at a solution to this problem. A person must now understand what the Enumerable.Range() and .Select() functions do. I will not argue that you should have an understanding of that to write C#/.NET code as these functions have been in the BCL for many years now. ...
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How do I install and use curl on Windows?

... needed. Close open console windows and reopen, so they get the new PATH. Now enjoy typing curl at any command prompt. Party time! share | improve this answer | follow ...
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How to asynchronously call a method in Java

...ot (yet) have first-class functions, so this is the state of the art right now. – shadit Dec 4 '09 at 5:11 thanks for ...
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How to check if an intent can be handled from some activity?

... well, with android api 30+, it doesn't always work now) – user924 Jun 24 at 14:30 add a comment  |  ...
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How do I git rebase the first commit?

I used git init to create a fresh repo, then made three commits. Now I want to rebase to go back and amend my first commit, but if I do git rebase -i HEAD~3 it complains! If I try the same with HEAD~2 then it kinda works but only lets me rearrange the last two commits. ...
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Call Go functions from C

...me progress info to the user whenever it gets called. Since it has a well known signature, we can assign it its own type: type ProgressHandler func(current, total uint64, userdata interface{}) int This handler takes some progress info (current number of files received and total number of files) a...
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How to parse JSON using Node.js? [closed]

... Anyone know why that's not in the official documentation? Or, if it is, where to find it? – snapfractalpop Mar 21 '12 at 18:58 ...
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'Static readonly' vs. 'const'

...ed to, it may be wise to only use const for values that are actually well known constants if they are made public otherwise they should be reserved for internal, protected, or private access scope. – jpierson Mar 9 '11 at 18:38 ...