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数据库的那些事（全是干货）
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谈到数据库，大家第一想法就是怎么去优化，怎么让查询操作更快。我认为最好的方式就是从开始数据库设计的时候就要尽量考虑周全。如果不幸是个老项目，就得从优化入手了。接下就从设计和优化谈一下我的一些认识和经验。
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