如何将 ASCII() 函数与 MySQL WHERE 子句结合使用?
mysqlmysqli database更新于 2025/4/20 18:20:17
在将 ASCII() 函数与 WHERE 子句结合使用时，其返回的输出将取决于 WHERE 子句中给出的条件。例如，假设我们有一个名为"Student"的表，我们想要获取学生姓名第一个字符的大于 65 的数字代码。此查询可以编写如下 −
mysql> Select * from student; +------+---------+---------+-----------+ | Id | Name | Address | Subject | +------+---------+---------+-----------+ | 1 | Gaurav | Delhi | Computers | | 2 | Aarav | Mumbai | History | | 15 | Harshit | Delhi | Commerce | | 20 | Gaurav | Jaipur | Computers | +------+---------+---------+-----------+ 4 rows in set (0.10 sec) mysql> Select Name, ASCII(Name) As 'ASCII VALUE OF 1st Character' From Student WHERE ASCII(Name)>65; +---------+------------------------------+ | Name | ASCII VALUE OF 1st Character | +---------+------------------------------+ | Gaurav | 71 | | Harshit | 72 | | Gaurav | 71 | +---------+------------------------------+ 3 rows in set (0.00 sec)
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