Cascading delete rows from multiple tables in SQL - sql

Question

I've got two tables with the following structure:
Person
Id
Name
Class
Id
PersonId
Sequence
and some data:
Person
1 name1
2 name2
3 name3
Class
1 1 3
2 1 1
3 1 2
4 2 1
Class table can contain multiple rows related to one row from Person. PersonId from Class table is foreign key to Id in Person table. I'd like to delete data related to Person with Id 1, so remove the 3 rows from Class, and 1 row from Person using one query.
How can I do that in SQL?

Answer 1

Try This:
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