用MySQL删除表中的特定行

要仅删除特定的行，请使用MySQL NOT IN()。首先让我们创建一个表 −

mysql> create table DemoTable1830 (
 StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
 StudentName varchar(20)
 )AUTO_INCREMENT=101;
Query OK, 0 rows affected (0.00 sec)

使用insert命令向表中插入一些记录 −

mysql> insert into DemoTable1830(StudentName) values('Chris');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1830(StudentName) values('David');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1830(StudentName) values('Mike');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1830(StudentName) values('Sam');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1830(StudentName) values('Bob');
Query OK, 1 row affected (0.00 sec)

使用select语句显示表中的所有记录 −

mysql> select * from DemoTable1830;

这将产生以下输出 –

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|       101 | Chris       |
|       102 | David       |
|       103 | Mike        |
|       104 | Sam         |
|       105 | Bob         |
+-----------+-------------+
5 rows in set (0.00 sec)

以下是仅删除特定行的查询 –

mysql> delete from DemoTable1830
 where StudentId NOT IN('101','103','105');
Query OK, 2 rows affected (0.00 sec)

让我们再次检查表中的记录：

mysql> select * from DemoTable1830;

这将产生以下输出 −

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|       101 | Chris       |
|       103 | Mike        |
|       105 | Bob         |
+-----------+-------------+
3 rows in set (0.00 sec)

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