在单个查询中使用IN()从MySQL表中删除记录

让我们创建一个表 –

mysql> create table DemoTable1922
   (
   StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   StudentName varchar(20)
   );
Query OK, 0 rows affected (0.00 sec)

使用insert命令在表中插入一些记录 –

mysql> insert into DemoTable1922(StudentName) values('Chris');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1922(StudentName) values('Robert');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1922(StudentName) values('David');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1922(StudentName) values('Mike');
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 DemoTable1922;

这将产生以下输出 –

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|         1 | Chris       |
|         2 | Robert      |
|         3 | David       |
|         4 | Mike        |
+-----------+-------------+
4 rows in set (0.00 sec)

这是使用IN()从表中删除记录的查询 –

mysql> delete from DemoTable1922 where StudentId IN(1,2,3,4);
Query OK, 4 rows affected (0.00 sec)

让我们再次检查表中的记录 –

mysql> select * from DemoTable1922;

这将产生以下输出 –

Empty set (0.00 sec)

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