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Hidden Features Of Perl, PHP, Javascript, C, C++, C#, Java, Ruby, Python, And Others [Collection Of Incredibly Useful Lists]
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Introduction

StackOverflow is an amazing site for coding questions. It was created by Joel Spolsky of joelonsoftware.com, Jeff Atwood of codinghorror.com, and some other incredibly smart guys who truly care about user experience. I have been a total fan of SO since it went mainstream and it's now a borderline addiction (you can see my StackOverflow badge on the right sidebar).

The Story

Update 6/21/09: This server is currently under very heavy load (10-200), even with caching plugins enabled. Please bear with me as I try to

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MySQL Conference Liveblogging: MySQL Hidden Treasures (Thursday 11:55PM)
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  • Damien Seguy of Nexen Services presents
  • easiest session of all (phew, that's a relief)
  • clever SQL recipes
  • tweaking SQL queries
  • shows an example where SELECT is ORDERED by a column that is actually an enum.
    • an enum is both a string and a number
    • sorted by number
    • displayed as string
    • can be sorted by string if it's cast as string
  • compact column
    • compacts storage
    • faster to search
    • if (var)char is turned into enum, some space can be saved, shows example
  • random order
    • order by rand(1) - obviously
    • the integer parameter is actually a seed
    • really slow, also obviously, especially for larger
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