Syntax:
expr REGEXP pat, expr RLIKE pat

Returns 1 if the string expr matches the regular expression specified
by the pattern pat, 0 otherwise. If expr or pat is NULL, the return
value is NULL.

REGEXP and RLIKE are synonyms for REGEXP_LIKE().

For additional information about how matching occurs, see the
description for REGEXP_LIKE().

URL: https://dev.mysql.com/doc/refman/8.0/en/regexp.html

