MySQL LIKE和NOT LIKE关键字

mysql> use test;

Database changed

mysql> create table student(age int(4), name varchar(20), address varchar(20));

Query OK, 0 rows affected (0.22 sec)



mysql> insert into student values(12, 'Jack', 'BeiJing'), (19, 'Mike', 'TianJin'), (21, 'Rose', 'ZhuHai'), (23, 'Ann', 'ShangHai'), (27, 'Alis', 'ShenZhen');

Query OK, 5 rows affected (0.08 sec)

Records: 5  Duplicates: 0  Warnings: 0



mysql> select * from student;

+------+------+----------+

| age  | name | address  |

+------+------+----------+

|   12 | Jack | BeiJing  |

|   19 | Mike | TianJin  |

|   21 | Rose | ZhuHai   |

|   23 | Ann  | ShangHai |

|   27 | Alis | ShenZhen |

+------+------+----------+

5 rows in set (0.07 sec)



mysql>

mysql> select * from student where name='Jack';
+------+------+---------+
| age  | name | address |
+------+------+---------+
|   12 | Jack | BeiJing |
+------+------+---------+
1 row in set (0.00 sec)

# like关键字是要完全匹配，与name='Jack'的作用相同

mysql> select * from student where name like 'Jack';
+------+------+---------+
| age  | name | address |
+------+------+---------+
|   12 | Jack | BeiJing |
+------+------+---------+
1 row in set (0.04 sec)

mysql>

mysql> select * from student where address='S%';

Empty set (0.00 sec)


# like匹配以S开头的address mysql> select * from student where address like 'S%';

+------+------+----------+

| age  | name | address  |

+------+------+----------+

|   23 | Ann  | ShangHai |

|   27 | Alis | ShenZhen |

+------+------+----------+

2 rows in set (0.00 sec)



mysql>

mysql> insert into student values(55, 'Make', 'GuangZhou');
Query OK, 1 row affected (0.02 sec)

mysql> select * from student;
+------+------+-----------+
| age  | name | address   |
+------+------+-----------+
|   12 | Jack | BeiJing   |
|   19 | Mike | TianJin   |
|   21 | Rose | ZhuHai    |
|   23 | Ann  | ShangHai  |
|   27 | Alis | ShenZhen  |
|   55 | Make | GuangZhou |
+------+------+-----------+
6 rows in set (0.00 sec)

# like匹配'_'表示匹配一个字符

mysql> select * from student where name like 'M_ke';
+------+------+-----------+
| age  | name | address   |
+------+------+-----------+
|   19 | Mike | TianJin   |
|   55 | Make | GuangZhou |
+------+------+-----------+
2 rows in set (0.00 sec)

mysql>

# not like表示“不匹配”关键字 
mysql> select * from student where name not like 'M_ke';

+------+------+----------+

| age  | name | address  |

+------+------+----------+

|   12 | Jack | BeiJing  |

|   21 | Rose | ZhuHai   |

|   23 | Ann  | ShangHai |

|   27 | Alis | ShenZhen |

+------+------+----------+

4 rows in set (0.00 sec)



mysql>