27% of analyst time is spent cleaning data (Harvard Business Review)
AI prompt engineering now requires structured text data
| Function | Magic Trick | Business Application |
|---|---|---|
| TEXTJOIN | =TEXTJOIN(", ",TRUE,Emails) |
Creating mailing lists from CRM data |
| CONCAT | =CONCAT(LEFT(Name,1),".",Surname) |
Generating usernames automatically |
| SUBSTITUTE | =SUBSTITUTE(Comment, "USD", "$") |
Standardizing financial reports |
=WORKDAY.INTL(StartDate, Days, "0000011") // Skips weekends & custom holidays
=EDATE(ContractDate, 12) // Find 1-year anniversary automatically
HR Case Study:
Calculate employee probation end dates accounting for company holidays
Assignment:
Clean a 500-row dataset of international transactions where dates are in 7 different formats
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