我们如何将 ASCII() 函数与 MySQL WHERE 子句一起使用？

将 ASCII() 函数与 WHERE 子句一起使用时，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“学生”的表，我们想要获取学生姓名的第一个字符的大于 65 的数字代码。对此的查询可以写成如下 -

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)