Learning Objectives
After completing this unit, you'll be able to:
- Profile a data set.
- Apply cleansing rules.
Profile First
Profiling scans a data set and reports nulls, patterns, and outliers, so you know what to fix before you fix it.
Cleanse with Rules
Rules standardize formats, fill defaults, and flag records for review. Run them on a schedule so quality doesn't drift.
Tip
Fix data at the source when you can. Cleansing downstream treats the symptom.
Quiz
To complete this unit, you need to answer all the quiz questions correctly.
+200 Points
1What should you do before cleansing?