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SQL&Python数据清洗方法与技巧汇总

  • 2026-03-13 14:54:11
SQL&Python数据清洗方法与技巧汇总

  日常工作中，分析师会接到一些专项分析的需求，首先会搜索脑中的分析体系，根据业务需求构建相应的分析模型，根据模型填充相应维度表，这些维度特征表能够被使用的前提是假设已经清洗干净了。
  但真正的原始表是混乱且包含了很多无用的冗余特征，所以能够根据原始数据清洗出相对干净的特征表就很重要。
  进行数据清洗的方式与工具有很多，根据场景需求的不同进行选择，今天给大家分享的是如何使用SQL进行数据清洗
  内容都在知识库里了，希望对大家有帮助！

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  1. CONNECT:[ UseTime:0.000890s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000969s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002264s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000467s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000666s ]
  6. SELECT * FROM `set` [ RunTime:0.001649s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000615s ]
  8. SELECT * FROM `article` WHERE `id` = 478011 LIMIT 1 [ RunTime:0.004065s ]
  9. UPDATE `article` SET `lasttime` = 1774581776 WHERE `id` = 478011 [ RunTime:0.019190s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000337s ]
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  12. SELECT * FROM `article` WHERE `id` > 478011 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000447s ]
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0.216483s