MySQL is not supporting single line comments here. What would be the reason?

Question

Here is what I am getting when I use single line comment (using --):

ERROR 1064 (42000): You have an error in your SQL syntax

Answer 1

Your syntax is wrong - read about comment syntax.

Just add a space after --:

mysql> select 1; -- test select
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set (0.00 sec)