Select the last name of all employees, without duplicates.
| SELECT lastname FROM employees
| GROUP lastname BY lastname
10 rows 0 msec
| GROUP lastname BY lastname
10 rows 0 msec
| lastname | 
|---|
| Doe | 
| Efron | 
| Foster | 
| Goldsmith | 
| Manikutty | 
| ODonnell | 
| Rogers | 
| Smith | 
| Stevens | 
| Swamy | 
GROUP eliminates duplicates. We do not have a distinct keyword.