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51CTO
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数据杂乱效率低?这套 MySQL 抽数清洗方案,企业都在用
咱们就拿订单表、用户表这些常见的来练手。目标很明确,整出一套能直接拿来分析、建模的干净数据。 说实话,干数据这行也有好几年了,我最近发现一个特别扎心的事。好多刚入行的小朋友,天天在那死磕复杂SQL、优化查询啥的,结果呢?被最基础的数据 ...
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