Lesson learned

• Common data problems
  • Data type constraint
  • Data range constraint
  • Uniqueness constraint
• Text and categorical data problems
  • Membership constraint
  • Categorical variables
  • cleaning text data
• Advanced data problems
  • Uniformity
  • Cross field validation
  • Completeness
• Record linkage!!
  
• 추가로 공부해야할 패키지
  • record linkage
  • Fuzzywuzzy
    • https://recordlinkage.readthedocs.io/en/latest/guides/link_two_dataframes.html