mysql,regex , MySQL substring match using regular expression; substring contain 'man' not 'woman'


MySQL substring match using regular expression; substring contain 'man' not 'woman'

Question:

Tag: mysql,regex

I have an issue while I fetch data from database using regular expression. While I search for 'man' in tags it returns tags contains 'woman' too; because its substring.

SELECT '#hellowomanclothing' REGEXP '^(.)*[^wo]man(.)*$'; # returns 0 correct, it contains 'woman'
SELECT '#helloowmanclothing' REGEXP '^(.)*[^wo]man(.)*$'; # returns 0 incorrect, it can contain anything other than 'woman' 
SELECT '#stylemanclothing' REGEXP '^(.)*[^wo]man(.)*$'; # returns 1 correct

How can I update the regular expression, when I search for 'man' it should return only the tag contains 'man' not 'woman'?


Answer:

A variant of n-dru pattern since you don't need to describe all the string:

SELECT '#hellowomanclothing' REGEXP '(^#.|[^o]|[^w]o)man';

Note: if a tag contains 'man' and 'woman' this pattern will return 1. If you don't want that Gordon Linoff solution is what you are looking for.


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