Regular expressions are special characters which help search data, matching complex patterns.
All Text
All Text Not Containing
Alpha
Alpha-numeric
Alpha-numeric and underscore
Cheat Sheet
Chinese characters
Digits
File Path
Numbers
Unicode
https://en.wikipedia.org/wiki/Regular_expression
https://www.regular-expressions.info/refadv.html
https://www.rexegg.com/regex-disambiguation.html