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从子查询中选择MySQL，然后执行DELETE？

2024-05-17 08:17:03 354

让我们首先创建一个表-

mysql> create table DemoTable1947
   (
   Id int,
   Name varchar(20)
   );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable1947 values(101,'Chris');
mysql> insert into DemoTable1947 values(102,'David');
mysql> insert into DemoTable1947 values(103,'Mike');
mysql> insert into DemoTable1947 values(104,'Bob');
mysql> insert into DemoTable1947 values(105,'Sam');

使用select语句显示表中的所有记录-

mysql> select * from DemoTable1947;

这将产生以下输出-

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

这是查询以实现select*fromsubquery然后执行DELETE-

mysql> delete from DemoTable1947 where Id
   IN(select * from (select Id from DemoTable1947 order by Id limit 3)as t);

让我们再次检查表记录-

mysql> select * from DemoTable1947;

这将产生以下输出-

+------+------+
| Id   | Name |
+------+------+
|  104 | Bob  |
|  105 | Sam  |
+------+------+
2 rows in set (0.00 sec)

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从子查询中选择MySQL，然后执行DELETE？

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