SQL 手册SQL 函数字符串函数ASCII本页总览ASCIIascii description Syntax INT ascii(VARCHAR str) 返回字符串第一个字符对应的 ascii 码 example mysql> select ascii('1');+------------+| ascii('1') |+------------+| 49 |+------------+mysql> select ascii('234');+--------------+| ascii('234') |+--------------+| 50 |+--------------+ keywords ASCII