Delete Data

Hi,

I have two tables.

CREATE TABLE [one] (
[roleno] [int] NOT NULL ,
[schno] [int] NULL ,
CONSTRAINT [PK_one] PRIMARY KEY CLUSTERED
(
[roleno]
) ON [PRIMARY] ,
CONSTRAINT [FK_one_two] FOREIGN KEY
(
[schno]
) REFERENCES [two] (
[schno]
)
) ON [PRIMARY]
GO

CREATE TABLE [two] (
[roleno] [int] NULL ,
[schno] [int] NOT NULL ,
CONSTRAINT [PK_two] PRIMARY KEY CLUSTERED
(
[schno]
) ON [PRIMARY] ,
CONSTRAINT [FK_two_one] FOREIGN KEY
(
[roleno]
) REFERENCES [one] (
[roleno]
)
) ON [PRIMARY]
GO


(I fact i created Primary & Foreign keys after inserting data in both of these tables.)

I want to delete data from these two tables.
How do i do that...Any Ideas?