淘宝大神总结的十大经典案例，1.InnoDB表如何设计主键索引 2.字符串索引隐式转换 3.表数据被莫名清空 4.InnoDB表更新锁问题等等。-Taobao great summary of the top ten classic case of God, 1.InnoDB table on how to design the primary key index 2. 3. string index implicit conversion table data is inexplicably