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What is the Oracle equivalent of SQL Server's IsNull() function?
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+1: COALESCE is ANSI, supported by Postgres, MySQL... The only caveat is that it doesn't necessarily perform as fast as native syntax.
– OMG Ponies
Aug 19 '10 at 17:33
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must appear in the GROUP BY clause or be used in an aggregate function
... to not really like it. Oracle and SQLServer just don't allow this at all. Mysql used to allow it by default, but now since 5.7 the administrator needs to enable this option (ONLY_FULL_GROUP_BY) manually in the server configuration for this feature to be supported...
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Why are variables “i” and “j” used for counters?
...ecific.) I'm sorry yours isn't the accepted one. All I can do is give it my upvote.
– John Y
Jun 2 '09 at 2:12
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How to sort the result from string_agg()
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I had the same problem as OP, and this approach was my first thought, but unfortunately it doesn't work (which brought me here), whereas Igor's does.
– chbrown
Feb 4 '16 at 14:13
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install / uninstall APKs programmatically (PackageManager vs Intents)
My application installs other applications, and it needs to keep track of what applications it has installed. Of course, this could be achieved by simply keeping a list of installed applications. But this should not be necessary! It should be the responsibility of the PackageManager to maintain the ...
How do I base64 encode (decode) in C?
...https://github.com/gaspardpetit/base64/
At this point, I have not limited myself to C algorithms - if one implementation performs well in C++, it can easily be backported to C. Also tests were conducted using Visual Studio 2015. If somebody wants to update this answer with results from clang/gcc, b...
mysqli or PDO - what are the pros and cons? [closed]
In our place we're split between using mysqli and PDO for stuff like prepared statements and transaction support. Some projects use one, some the other. There is little realistic likelihood of us ever moving to another RDBMS.
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C: differences between char pointer and array [duplicate]
...ot store an address anywhere (which should be clear from the memory map in my answer). Rather, array expressions will "decay" to pointer types unless they are operands of the unary & or sizeof operators (hence the difference in behavior for sizeof).
– John Bode
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How to fix “Headers already sent” error in PHP
When running my script, I am getting several errors like this:
11 Answers
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When is it appropriate to use C# partial classes?
... more than 36K lines (or probably much more, I don't remeber exactly), and my editors were blocked when the source was opened. Partial classes allowed me to see the produced code without havin 4 GB of RAM.
– Luca
Aug 30 '10 at 15:56
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