目录引言一、避免使用SELECT *1.1 问题分析1.2 优化方法1.3 性能对比案例二、合理使用WHERE条件2.1 问题分析2.2 优化方法2.3 性能对比案例三、优化ORDER BY3.1 问题分析3.2 优化方法3.3 性能对比案例四、优化GROUP B
I\'m a desktop application developer, and I plan learning html5, but as it\'s not released, there are (almost) no published books and not too much infomation for beginners on the web... I feel I shoul
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