级联删除SQL中多个表的行

Question

我有两个结构如下的表：

人

• 身份证
• 姓名

类

• 身份证
• 人员标识
• 序列

还有一些数据：

人

1   name1
2   name2
3   name3

类

1   1   3
2   1   1
3   1   2
4   2   1

Class 表可以包含与Person 中的一行相关的多行。来自Class 表的PersonId 是Person 表中Id 的外键。我想用Id 1 删除与Person 相关的数据，因此使用一个查询从Class 中删除3 行，并从Person 中删除1 行。

如何在 SQL 中做到这一点？

Answer 1

试试这个：

CREATE TABLE [dbo].[Class](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [PersonId] [int] NULL,
    [Sequence] [int] NULL,
 CONSTRAINT [PK_Class] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO
/****** Object:  Table [dbo].[Person]    Script Date: 26-05-2014 07:54:26 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Person](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [Person] [nchar](10) NULL,
 CONSTRAINT [PK_Person] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO
ALTER TABLE [dbo].[Class]  WITH CHECK ADD  CONSTRAINT [FK_Class_Person] FOREIGN KEY([PersonId])
REFERENCES [dbo].[Person] ([Id])
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[Class] CHECK CONSTRAINT [FK_Class_Person]
GO