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http://www.bigheaddba.net/article/y2009/339_mysql%E5%88%86%E5%8C%BA%E8%A1%A8%E5%B1%80%E9%99%90%E6%80%A7%E6%80%BB%E7%BB%93.html
http://www.ooso.net/archives/217
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