MySQL ASCII()函数
ASCII(str)
函数返回字符串str
第一个字符的ASCII码;如果str
是NULL
则返回NULL
;
select ASCII('abcdefg');
+------------------+
| ASCII('abcdefg') |
+------------------+
| 97 |
+------------------+
1 row in set (0.00 sec)
select ASCII('A');
+------------+
| ASCII('A') |
+------------+
| 65 |
+------------+
1 row in set (0.00 sec)