UPPER(str)

　返回字符串str，根据当前字符集映射的所有字符更改为大写。

SQL> SELECT UPPER('Allah-hus-ogeek');
+---------------------------------------------------------+
| UPPER('Allah-hus-ogeek')                                |
+---------------------------------------------------------+
| ALLAH-HUS-W3CSCHOOL                                         |
+---------------------------------------------------------+
1 row in set (0.00 sec)