Yurttas/PL/DBL/oracle/F/01/PC/q02.sql
1REM
2REM q02.sql
3REM
4REM Which manufactures make laptops with a hard disk of
5REM at least one gigabyte?
6REM
7
8SELECT DISTINCT P.maker
9FROM Product P, Laptop L
10WHERE P.model=L.model
11 AND L.hd>=1.0;