MariaDB regex working in online regex testers does not work in SELECT WHERE REGEXP

Question

I\'m having a problem a dataset I have been given in bad format E.G fullName column and no breakdown of names I\'m wanting to search where any of the names star

Answer 1

You may use

REGEXP '\\bJ'
        ^^^

Here, the \b is a word boundary that will force a match only when J is not preceded with a letter, digit or _.

The \ is doubled because the regex engine expects a literal \, and two backslashes are required.