CHAR(N,... [USING charset_name])

CHAR()解释每个参数n为整数，并返回由这些给出的字符串的字符的代码整数值。如遇NULL值则跳过。

mysql> SELECT CHAR(77,121,83,81,'76');
+---------------------------------------------------------+
| CHAR(77,121,83,81,'76')                                 |
+---------------------------------------------------------+
| MySQL                                                   |
+---------------------------------------------------------+
1 row in set (0.00 sec)