Ilisarnitsi SQL-qarasaaraa, imeriaqat aallakaatillu taaguunngitsut, suliffiit illit kisitsisutikkaat.
Kiinaluunniit nalunaat, ilinniartitsisut kingornaikki, tamaat ersersorneqartut kisimiillu nalunaat, Customer-tikku imaqarnermut, customer_name imaqarneq, customer_id imaqarneq, orders tikku imaqarnermut customer_id ilinniartitsineq. Ukiuni ersersorneqartut:

```sql
SELECT customer_name 
FROM customers 
WHERE customer_id NOT IN (SELECT DISTINCT customer_id FROM orders)
```

Tamaat ersersorneqartut customer_name imaqarnermut customers tikku imaqarnermullu, customer_id ilinniartitsisut orders tikku imaqarnermullu ilinniartitsineq.