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MySQL查询删除行

2024-05-20 08:09:05 472

使用DELETE删除MySQL中的一行。让我们首先创建一个表-

create table DemoTable
    (
    CustomerId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
    CustomerName varchar(100),
    CustomerAge int
    );

使用插入命令在表中插入一些记录-

insert into DemoTable(CustomerName,CustomerAge) values('John',33);

insert into DemoTable(CustomerName,CustomerAge) values('Bob',25);

insert into DemoTable(CustomerName,CustomerAge) values('David',28);

insert into DemoTable(CustomerName,CustomerAge) values('Carol',29);

使用select语句显示表中的所有记录-

select *from DemoTable;

输出结果

这将产生以下输出-

+------------+--------------+-------------+
| CustomerId | CustomerName | CustomerAge |
+------------+--------------+-------------+
|          1 | John         | 33          |
|          2 | Bob          | 25          |
|          3 | David        | 28          |
|          4 | Carol        | 29          |
+------------+--------------+-------------+
4 rows in set (0.00 sec)

以下是在MySQL中删除行的查询-

delete from DemoTable where CustomerName='David' and CustomerAge=28;

让我们再次检查表记录-

select *from DemoTable;

输出结果

这将产生以下输出-

+------------+--------------+-------------+
| CustomerId | CustomerName | CustomerAge |
+------------+--------------+-------------+
| 1          | John         | 33          |
| 2          | Bob          | 25          |
| 4          | Carol        | 29          |
+------------+--------------+-------------+
3 rows in set (0.00 sec)

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MySQL查询删除行

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