Must-read for US data cleaning: How to unify numbers into E.164 format (country code, spaces, brackets and duplicate number processing)
Before the US customer acquisition data was uploaded to KK-DATA, the number format was messy, causing the number screening to fail? This article explains the E.164 standard in detail, teaches you to remove spaces, brackets, and hyphens, add +1 country code uniformly, and clean duplicate numbers. Combined with batch operation techniques such as Excel and regular expressions, it can greatly improve the accuracy and efficiency of US screening numbers. It is an essential tutorial for cleaning US data.