Can't query one view from another?
You have to rewrite the second View as follows:

create view `Months` as
    select N+1 MonthNum from `Numbers`
    union all select 11
    union all select 12
;


Here is proof

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mysql&gt; use test
Database changed
mysql&gt; create view `Numbers` as
    -&gt;     select 0 N union all select 1 union all select 2 union all
    -&gt;     select 3 union all select 4 union all select 5 union all
    -&gt;     select 6 union all select 7 union all select 8 union all select 9;
Query OK, 0 rows affected (0.05 sec)

mysql&gt; create view `Months` as
    -&gt;     select N+1 MonthNum from `Numbers`
    -&gt;     union all select 11
    -&gt;     union all select 12
    -&gt; ;
Query OK, 0 rows affected (0.03 sec)

mysql&gt;


Behold the output of the Query

mysql&gt; select * from Months;
+----------+
| MonthNum |
+----------+
|        1 |
|        2 |
|        3 |
|        4 |
|        5 |
|        6 |
|        7 |
|        8 |
|        9 |
|       10 |
|       11 |
|       12 |
+----------+
12 rows in set (0.00 sec)

mysql&gt;


Give it a Try !!!