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从CRUD编程切换到事件溯源和区块链编程
source link: http://www.jdon.com/49396?
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CRUD是增删改查的简称，其中增删改都属于一种变动操作，而新增和删改分别属于两种不同类型的变动，如果以记账来类比，新增等同于多了一笔金额，而删改等同于减少了一笔金额。 下面以文档的增删改查从记账角度..
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