我们如何将 MySQL INSTR() 函数与 WHERE 子句一起使用？

mysql> Select * from Student;
+------+---------+---------+-----------+
| Id   | Name    | Address | Subject   |
+------+---------+---------+-----------+
| 1    | Gaurav  | Delhi   | Computers |
| 2    | Aarav   | Mumbai  | History   |
| 15   | Harshit | Delhi   | Commerce  |
| 20   | Gaurav  | Jaipur  | Computers |
| 21   | Yashraj | NULL    | Math      |
+------+---------+---------+-----------+

5 rows in set (0.02 sec)

mysql> select name, INSTR(Name,'av')As Result from student where INSTR(Name,'av') > 0;

+--------+--------+
| name   | Result |
+--------+--------+
| Gaurav |      5 |
| Aarav  |      4 |
| Gaurav |      5 |
+--------+--------+

3 rows in set (0.00 sec)

mysql> select name, INSTR(Name,'av')As Result from student where INSTR(Name,'av') = 0 ;

+---------+--------+
| name    | Result |
+---------+--------+
| Harshit |      0 |
| Yashraj |      0 |
+---------+--------+

2 rows in set (0.01 sec)