2.4 对字母数字的混合排序

问题：现有字母和数字混合的数据，希望按照数字或字符部分来排序。考虑这个视图：

create view V
as  
    select concat(ename, ' ',deptno) from emp;

mysql> select * from v;
+---------------------------+
| concat(ename, ' ',deptno) |
+---------------------------+
| SMITH 20                  |
| ALLEN 30                  |
| WARD 30                   |
| JONES 20                  |
| MARTIN 30                 |
| BLAKE 30                  |
| CLARK 10                  |
| SCOTT 20                  |
| KING 10                   |
| TURNER 30                 |
| ADAMS 20                  |
| JAMES 30                  |
| FORD 20                   |
| MILLER 10                 |
+---------------------------+
14 rows in set (0.00 sec)


由于MySQL不支持translate函数，这个问题无解决方案。