Développement de parcs éoliens

Requête invalide: SELECT * FROM diaporama_fr WHERE date_en_ligne = 0 AND date_hors_ligne = 0 UNION SELECT * FROM diaporama_fr WHERE date_en_ligne <> 0 AND date_en_ligne <= CURDATE() AND date_hors_ligne = 0 UNION SELECT * FROM diaporama_fr WHERE date_en_ligne = 0 AND date_hors_ligne <> 0 AND date_hors_ligne >= CURDATE() UNION SELECT * FROM diaporama_fr WHERE date_en_ligne <> 0 AND date_en_ligne <= CURDATE() AND date_hors_ligne <> 0 AND date_hors_ligne >= CURDATE() ORDER BY ordre ASC LIMIT 0, 5