Is it possible to have a tableless select with multiple rows?

You can use Table Value Constructors for this if supported by your RDBMS. Here's an example from Mr Celko

SELECT X.*
FROM   (VALUES (1, 3.07766, 6.31371, 12.7062, 63.65600),
               (2, 1.88562, 2.91999, 4.30265, 9.92482),
               (3, 1.63774, 2.35336, 3.18243, 5.84089)) AS X (A, B, C, D, E); 

Use a UNION:

SELECT 1
UNION
SELECT 2

Looks like this in MySQL:

+---+
| 1 |
+---+
| 1 | 
| 2 | 
+---+

Use UNION ALL to avoid the loss of non-unique rows.