Contoh jenis-jenis Rasio Kardinalitas

RASIO KARDINALITAS 

1 : 1 (One to One)

Relasi di bawah mempunyai rasio kardinalitas 1 : 1

1 orang Mahasiswa hanya mempunyai 1 SIM, begitu juga sebaliknya 1 SIM  hanya dimiliki oleh 1 Mahasiswa.

SIM

Mahasiswa

                                                1                                                   1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

                                                                                   

1 : N (One to Many)                                                                                                                                                 

Relasi di bawah mempunyai rasio kardinalitas 1 : N

Jurusan IPA memiliki beberapa cabang ilmu seperti Biologi, tapi Biologi hanya ada pada Jurusan IPA .

Biologi

IPA

                                                1                                                   N                                                                                                                                                                                                                                                                                                                                       

                                                                                                                                               

N : 1  (Many to One)                                    

Relasi di bawah mempunyai rasio kardinalitas N : 1

Motor Supra 125x hanya produk milik HONDA, tapi HONDA memiliki banyak produk selain Supra 125x.

HONDA

Supra 125x

                                                N                                                  1                                                                                                                                                                                        

                       

N : M  (Many to Many)

Relasi di bawah mempunyai rasio kardinalitas N : M

Mahasiswa punya banyak Dosen, dan juga Dosen punya banyak Mahasiswa

Dosen

Mahasiswa

                                                N                                                  M