> delete dm_sysobject_s where r_object_id =(select r_object_id from dm_public_key_certificate_s where key_type = 1); > delete dm_sysobject_r where r_object_id = (select r_object_id from dm_public_key_certificate_s where key_type = 1); > delete dm_public_key_certificate_s where key_type = 1; > delete dm_sysobject_s where r_object_id = (select r_object_id from dm_cryptographic_key_s where key_type = 1); > delete dm_sysobject_r where r_object_id = (select r_object_id from dm_cryptographic_key_s where key_type = 1); > delete dm_cryptographic_key_s where key_type = 1;