-- @tag: customer_add_constraints
-- @description: Zusätzliche Fremdschlüssel für Sprache, Kundentyp und Zahlungskonditionen
-- @depends: release_2_6_3
--- @charset: utf-8
-- @ignore: 0
--- verwaiste Zahlungsbedingungen vorher entfernen:
-update customer set payment_id = NULL where payment_id not in (select id from payment_terms);
+-- verwaiste Einträge vorher entfernen
+UPDATE customer SET payment_id = NULL WHERE payment_id NOT IN (SELECT id FROM payment_terms);
+UPDATE customer SET language_id = NULL WHERE language_id NOT IN (SELECT id FROM language);
+UPDATE customer SET business_id = NULL WHERE business_id NOT IN (SELECT id FROM business);
ALTER TABLE customer ADD FOREIGN KEY (payment_id) REFERENCES payment_terms (id);
ALTER TABLE customer ADD FOREIGN KEY (language_id) REFERENCES language (id);