mysql> SELECT upper(CompanyName) AS 'Firma' FROM shippers;
+------------------+
| Firma            |
+------------------+
| SPEEDY EXPRESS   | 
| UNITED PACKAGE   | 
| FEDERAL SHIPPING | 
+------------------+
3 rows in set (0.34 sec)

mysql> SELECT lower(CompanyName) AS 'Firma' FROM shippers;
+------------------+
| Firma            |
+------------------+
| speedy express   | 
| united package   | 
| federal shipping | 
+------------------+
3 rows in set (0.00 sec)
