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关于乐观锁与悲观锁的实际应用
source link: https://juejin.im/post/5c0009adf265da614a3a3741
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开门见山，先聊一聊我实际遇到的业务问题：在项目中有一个竞猜下注的功能，它的赔率是根据A队和B队两边的下注总金额来计算的。于是当有用户下注某一边时，两边的赔率都会进行相应的变化。反应到数据库里就是（简化版本），一个人下注，会更改数据库盘口表的几个字段：A队赔率，
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