Set value to records with cm_subscription_id NULL UPDATE acm_subscription_event se SET cm_subscription_id = CONCAT((SELECT s.cm_subscription_id FROM acm_subscription as s WHERE se.cm_event_subscription_owner = s.cm_user_id AND se.cm_event_object_type = s.cm_object_type AND se.cm_event_object_id = s.cm_object_id), '-SUBSCRIPTION') WHERE se.cm_subscription_id IS NULL; Set value to records with cm_subscription_id NULL UPDATE acm_subscription_event SET cm_subscription_id = CONCAT((SELECT s.cm_subscription_id FROM acm_subscription as s WHERE cm_event_subscription_owner = s.cm_user_id AND cm_event_object_type = s.cm_object_type AND cm_event_object_id = s.cm_object_id), '-SUBSCRIPTION') WHERE cm_subscription_id IS NULL;