Advanced Data Validation Engine with Regex and Custom Excel Functions

Seed: Validation rules table (column, regex, message), custom function examples via LAMBDA: =LAMBDA(x,IF(REGEXMATCH(x,pattern),TRUE,FALSE))

Implementation Guide

Implements robust data validation rules using Excel 365 LAMBDA and REGEX functions (or VBA for legacy Excel), providing standardized error messages, auto-corrections, and a governance sheet listing rule owners and severity. Great for admin teams receiving many external files and needing strict input hygiene.

💡 Expert Q&A Insights

Q: \

Does REGEX work in all Excel versions?\" \"

Q: REGEX functions are available in modern Excel 365; for older versions use VBA or Power Query text functions.\"\n\"

How to handle false positives?\" \"

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