| PRINT 'a' || 'b'; | |
| PRINT 'a' || 1 || 'b'; | |
| PRINT 1 || 'a' || 'b'; | |
| PRINT 'a' || null || 'b'; | |
| PRINT null || 'a' || 'b'; | |
| PRINT null || null; | |
| DECLARE c INT; | |
| PRINT 'Integer increment'; | |
| c := 3; | |
| c := c + 1; | |
| PRINT c; | |
| PRINT 'Integer decrement'; | |
| c := 3; | |
| c := c - 1; | |
| PRINT c; | |
| PRINT NVL(null - 3, 'Correct'); | |
| PRINT NVL(null + 3, 'Correct'); |