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SQL_DataAnalysis
SQL数据分析
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RFM
#84
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kemistep
opened
4 years ago
kemistep
commented
4 years ago
kemistep
commented
4 years ago
kemistep
commented
4 years ago
对R进行分档,比如0到4天(最近有充值)的得分是5,但26到30天(近一个月没充值)的得分只有1