Je suis au niveau 3 avec periods4
Je dois chercher Predynastic dans period_fr
Cherchons le type de period_fr
requête : SELECT t.typcategory FROM pg_attribute a JOIN pg_type t ON t.oid = a.atttypid JOIN pg_class c ON c.oid = a.attrelid WHERE c.relname = 'periods4' AND a.attname = 'period_fr' AND a.attnum > 0 AND n.nspname = 'public'Erreur SQL (IsInt):
ERROR: missing FROM-clause entry for table "n" LINE 8: AND n.nspname = 'public' ^