Final_Score = 0.4×Severity + 0.3×Frequency + 0.3×Fraud_Risk Policies are then categorized into: - **Tier 1 — Low Risk** - **Tier 2 — Medium Risk** - **Tier 3 ...

排名函数是Sql Server2005新增的功能，下面简单介绍一下他们各自的用法和区别。我们新建一张Order表并添加一些初始数据方便我们查看效果。 row_number的用途的非常广泛，排序最好用他，一般可以用来实现web程序的分页，他会为查询出来的每一行记录生成一个序号 ...

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