SQL 手册SQL 函数字符串函数ascii本页总览asciiasciidescriptionSyntaxINT ascii(VARCHAR str)返回字符串第一个字符对应的 ascii 码examplemysql> select ascii('1');+------------+| ascii('1') |+------------+| 49 |+------------+mysql> select ascii('234');+--------------+| ascii('234') |+--------------+| 50 |+--------------+keywordsASCII