SQL UPPER()函數(shù)

UPPER(str)

　返回字符串str，根據(jù)當(dāng)前字符集映射的所有字符更改為大寫。

SQL> SELECT UPPER('Allah-hus-w3cschool');
+---------------------------------------------------------+
| UPPER('Allah-hus-w3cschool')                                |
+---------------------------------------------------------+
| ALLAH-HUS-W3CSCHOOL                                         |
+---------------------------------------------------------+
1 row in set (0.00 sec)