SELECT name FROM manufacturers EXCEPT SELECT T2.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.Manufacturer  =  T2.code WHERE T1.name  =  'DVD drive'
What are the names of companies that do not make DVD drives?
SELECT name FROM manufacturers EXCEPT SELECT T2.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.Manufacturer = T2.code WHERE T1.name = 'DVD drive '
select name from manufacturers except select t2 . name from products as t1 join manufacturers as t2 on t1 . manufacturer = t2 . code where t1 . name = value
What are the names of companies that do not make DVD drives ?