While a Database is comprised of many things, Tables are the main data element that admins deal with. In any case, rob answered your original post of:

first , Drop all constraint (primary Key & foreign key) then DELETE all
Record !

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PERSIAN BOY present :

Hi freinds
my solution :

Create table #t(id bigint,lvl int)

insert into #t
Select distinct id,0 from sysobjects where id not in(
Select fkeyid From sysforeignkeys where fkeyid<>rkeyid)
and type='u'
Declare @l int
Set @L=0
While @L<1000
Begin
insert into #t
    Select distinct fkeyid,@L+1 from sysforeignkeys where rkeyid in(
    Select id From #T where lvl=@L) and fkeyid<>rkeyid
    if @@Rowcount=0 Set @L=1001
    Set @L=@L+1
End
Declare Cr1 Cursor local For
Select id From #T order by lvl desc
Declare @id bigint,@TName varchar(max)
Open Cr1
Fetch Next From cr1 into @Id
While @@Fetch_Status=0
Begin
    Select @Tname='Delete ['+(
        Select Name from sysusers where uid=sysobjects.uid)
        +'].['+name +']' From sysobjects where id=@id
    --exec( @TName)

    Fetch Next From cr1 into @Id
End
Drop table #T



WARNING :
for RUN (empty) out from comment --exec( @TName) .


:D