Le reste de la formation est réservé aux inscrits.
S'inscrire gratuitementSELECT UPPER(nom) AS nom_maj, LOWER(email) AS email_min, LENGTH(description) AS taille, SUBSTRING(telephone FROM 1 FOR 3) AS indicatif, REPLACE(description, 'ancien', 'nouveau') AS desc_updated FROM clients; SELECT * FROM clients WHERE email ~* '^[a-z]+\.[a-z]+@.*'; -- regex case-insensitive