“mysql trouve des caractères non alphanumériques” Réponses codées

mysql trouve des caractères non alphanumériques

/*find rows in mysql with non-alphanumeric chars*/
SELECT * FROM user WHERE first_name REGEXP "[^A-Za-z0-9]+";

/*find rows with non-alphanumeric or space chars*/
SELECT * FROM user WHERE first_name REGEXP "[^A-Za-z0-9[:space:]]+";