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MySql Table Insert if not exist otherwise update
It works if the datenum exists, but I want to insert this data as a new row if the datenum does not exist.
3 Answers
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Should struct definitions go in .h or .c file?
I've seen both full definitions of struct s in headers and just declarations—is there any advantage to one method over the other?
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Can mustache iterate a top-level array?
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Guava: Why is there no Lists.filter() function?
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Routing with Multiple Parameters using ASP.NET MVC
Our company is developing an API for our products and we are thinking about using ASP.NET MVC. While designing our API, we decided to use calls like the one below for the user to request information from the API in XML format:
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What does !important mean in CSS?
What does !important mean in CSS?
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Webrick as production server vs. Thin or Unicorn?
It seems like it's taken for granted that you must not use Webrick as production server, but I can't really find anywhere mentioning why. The consensus seems to be:
"Webrick is ok for development, but Thin or Unicorn is the choice for production, period."
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Vim: How to insert in visual block mode?
How can you insert when you are in visual block mode (by pressing ctrl-V) in Vim?
4 Answers
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What does “static” mean in C?
I've seen the word static used in different places in C code; is this like a static function/class in C# (where the implementation is shared across objects)?
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What does “not run” mean in R help pages?
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