How to get self-calculation output from MySQL without a virtual table named Dual?

In MySQL, we can simply specify the SELECT condition separately to get self-calculated output. The following example will demonstrate it -

mysql> Select 1+1;

+-----+
| 1+1 |
+-----+
| 2   |
+-----+
   
1 row in set (0.02 sec)

mysql> Select 1;

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

1 row in set (0.00 sec)

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