If you want to add spaces in a string then you can use SPACE function of mysql. SPACE function returns a string consisting of N space characters means SPACE will returns the white space equal to passed argument n, where n is a integer value means if you passed 5 as argument with this function then this returns 5 spaces.
Here is a example-
mysql> SELECT SPACE(5);
+----------+
| SPACE(5) |
+----------+
| |
+----------+
1 row in set (0.00 sec)
mysql> SELECT SPACE(15);
+-----------------+
| SPACE(15) |
+-----------------+
| |
+-----------------+
1 row in set (0.00 sec)
mysql> SELECT SPACE(30);
+--------------------------------+
| SPACE(30) |
+--------------------------------+
| |
+--------------------------------+
1 row in set (0.00 sec)
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