Bases de données relationnelles

iTunes Music Library<dict>

<key>Track ID</key><integer>1281</integer> <key>Name</key><string>Dazed And Confused</string> <key>Artist</key><string>Led Zeppelin</string> <key>Composer</key><string>Led Zeppelin</string> <key>Album</key><string>The Song Remains The Same</string> <key>Kind</key><string>Fichier audio AAC</string> <key>Size</key><integer>27649304</integer> <key>Total Time</key><integer>1671695</integer> <key>Year</key><integer>2007</integer> <key>BPM</key><integer>40</integer> <key>Date Modified</key><date>2007-12-27T17:34:42Z</date> <key>Date Added</key><date>2009-11-02T13:41:58Z</date> <key>Bit Rate</key><integer>128</integer> <key>Sample Rate</key><integer>44100</integer> <key>Rating</key><integer>80</integer> <key>Rating Computed</key><true/> <key>Album Rating</key><integer>80</integer> <key>Sort Album</key><string>Song Remains The Same</string> <key>Persistent ID</key><string>7C7C6699E8469B39</string> <key>Track Type</key><string>File</string> <key>File Type</key><integer>1295270176</integer><key>Location</key><string>file://localhost/Users/js/Music/iTunes/iTunes%20Music/Led% 20Zeppelin/The%20Song%20Remains%20The%20Same/Dazed%20And%20Confused.m4a</string><key>File Folder Count</key><integer>4</integer><key>Library Folder Count</key><integer>1</integer>

</dict>

iTunes Music Store

Date Titre Client Prix

1 décembre 2013 No Quarter Dupont 1,00 €

12 janvier 2014 Moog Island Durand 1,00 €

15 janvier 2014 No. 13 Baby Martin 1,00 €

16 janvier 2014 There There Martin 1,00 €

20 février 2014 Mr. Mastondont Farm Machin 1,00 €

Structure d’une table

Pilote NumPil NomPil Adresse Salaire

1 Dupond Paris 150002 Dupré Toulouse 200003 Duchamp Paris 90004 Durand Montpellier 120005 Dupond Nice 11000

nom dʼune relation

n-uplet/tuple/enregistrement

attribut

Degré : nombre dʼattributs = 4Cardinalité : nombre de tuples = 5

Structure d’une table

Titre Durée Interprète Album Genre

Comanche 2:10 Cake Motorcade Of Generosity Alternative/Punk

Ruby Sees All 3:00 Cake Motorcade Of Generosity Alternative/Punk

Up So Close 3:14 Cake Motorcade Of Generosity Alternative/Punk

Man-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin Rock

Man-Sized Wreath 2:33 R.E.M. Accelerate Rock

This Boy 2:22 Franz Ferdinand You Could Have It So Much Better Alternative/Punk

Walk Away 3:36 Franz Ferdinand You Could Have It So Much Better Alternative/Punk

Evil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better Alternative/Punk

There Goes My Gun 1:50 Pixies Doolittle Alternative/Punk

Rock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity Alternative/Punk

Attributs

clé primaire ?

Éléments

Structure d’une table

identifiant Titre Durée Interprète Album Genre

1 Comanche 2:10 Cake Motorcade Of Generosity Alternative/Punk

2 Ruby Sees All 3:00 Cake Motorcade Of Generosity Alternative/Punk

3 Up So Close 3:14 Cake Motorcade Of Generosity Alternative/Punk

4 Man-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin Rock

5 Man-Sized Wreath 2:33 R.E.M. Accelerate Rock

6 This Boy 2:22 Franz Ferdinand You Could Have It So Much Better Alternative/Punk

7 Walk Away 3:36 Franz Ferdinand You Could Have It So Much Better Alternative/Punk

8 Evil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better Alternative/Punk

9 There Goes My Gun 1:50 Pixies Doolittle Alternative/Punk

10 Rock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity Alternative/Punk

clé primaire

Structure d’une baseTitre Durée Interprète Album

Comanche 2:10 Cake Motorcade Of Generosity

Up So Close 3:14 Cake Motorcade Of Generosity

Man-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin

Man-Sized Wreath 2:33 R.E.M. Accelerate

This Boy 2:22 Franz Ferdinand You Could Have It So Much Better

Evil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better

There Goes My Gun 1:50 Pixies Doolittle

Rock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity

table morceaux

Nom

Cake

R.E.M.

Franz Ferdinand

Pixies

table interprètes table albumsAlbum Interprète

Motorcade Of Generosity CakeFashion Nugget CakeLive At The Olympia In Dublin R.E.M.Accelerate R.E.M.Trompe le Monde PixiesYou Could Have It So Much Better Franz FerdinandDoolittle Pixies

clés étrangères

clé étrangère

Structure d’une baseidentifiant Titre Durée Interprète Album

1 Comanche 2:10 1 12 Up So Close 3:14 1 13 Man-Sized Wreath 3:09 2 34 Man-Sized Wreath 2:33 2 45 This Boy 2:22 3 66 Evil And A Heathen 2:06 3 67 There Goes My Gun 1:50 4 78 Rock 'n' Roll Lifestyle 4:14 1 1

table morceaux

identifiant Nom

1 Cake

2 R.E.M.

3 Franz Ferdinand

4 Pixies

table interprètes table albumsidentifiant Album Interprète

1 Motorcade Of Generosity 12 Fashion Nugget 13 Live At The Olympia In Dublin 24 Accelerate 25 Trompe le Monde 46 You Could Have It So Much Better 37 Doolittle 4

clés étrangères

clé étrangère

UnionNom Prénom Pays

Waters Roger UKBarbelivien Philippe FBuck Peter USAYorke Tom UKVerschuren André BAdamo Salvatore BBlack Franck USAZimmermann Robert USA

table compositeurs

table interprètes

Nom Prénom Pays

Wright Richard UKGray Félix FFrançois Jean-Pierre FYorke Tom UKHendrix Jimi USAWaters Muddy USABlack Franck USAZimmermann Robert USA

table interprètes ∪ table compositeurs

Nom Prénom Pays

Waters Roger UK

Barbelivien Philippe F

Buck Peter USA

Yorke Tom UK

Verschuren André B

Adamo Salvatore B

Black Franck USA

Wright Richard UK

Gray Félix F

François Jean-Pierre F

Hendrix Jimi USA

Waters Muddy USA

Zimmermann Robert USA

Fusion

IntersectionNom Prénom Pays

Waters Roger UKBarbelivien Philippe FBuck Peter USAYorke Tom UKVerschuren André BAdamo Salvatore BBlack Franck USAZimmermann Robert USA

table compositeurs

table interprètes

Nom Prénom Pays

Wright Richard UKGray Félix FFrançois Jean-Pierre FYorke Tom UKHendrix Jimi USAWaters Muddy USABlack Franck USAZimmermann Robert USA

table interprètes ∩ table compositeurs

Nom Prénom Pays

Yorke Tom UK

Black Franck USA

Zimmermann Robert USA

DifférenceNom Prénom Pays

Waters Roger UKBarbelivien Philippe FBuck Peter USAYorke Tom UKVerschuren André BAdamo Salvatore BBlack Franck USAZimmermann Robert USA

table compositeurs

table interprètes

Nom Prénom Pays

Wright Richard UKGray Félix FFrançois Jean-Pierre FYorke Tom UKHendrix Jimi USAWaters Muddy USABlack Franck USAZimmermann Robert USA

table interprètes - table compositeurs

Nom Prénom Pays

Waters Roger UK

Barbelivien Philippe F

Verschuren André B

Adamo Salvatore B

table compositeurs - table interprètes

Nom Prénom Pays

Wright Richard UK

Gray Félix F

François Jean-Pierre F

Hendrix Jimi USA

Waters Muddy USA

SélectionTitre Durée Interprète Album

Comanche 2:10 Cake Motorcade Of GenerosityUp So Close 3:14 Cake Motorcade Of GenerosityMan-Sized Wreath 3:09 R.E.M. Live At The Olympia In DublinMan-Sized Wreath 2:33 R.E.M. AccelerateThis Boy 2:22 Franz Ferdinand You Could Have It So Much BetterEvil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much BetterThere Goes My Gun 1:50 Pixies DoolittleRock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity

table morceaux = R

Titre Durée Interprète Album

Comanche 2:10 Cake Motorcade Of Generosity

Up So Close 3:14 Cake Motorcade Of Generosity

Rock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity

Sélection σP (R)

P est la proposition Album=”Motorcade Of

Generosity”

σ(Album=”Motorcade Of Generosity”)(morceaux)

ProjectionTitre Durée Interprète Album

Comanche 2:10 Cake Motorcade Of GenerosityUp So Close 3:14 Cake Motorcade Of GenerosityMan-Sized Wreath 3:09 R.E.M. Live At The Olympia In DublinMan-Sized Wreath 2:33 R.E.M. AccelerateThis Boy 2:22 Franz Ferdinand You Could Have It So Much BetterEvil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much BetterThere Goes My Gun 1:50 Pixies DoolittleRock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity

table morceaux = R

Titre Interprète

Comanche CakeUp So Close CakeMan-Sized Wreath R.E.M.Man-Sized Wreath R.E.M.This Boy Franz FerdinandEvil And A Heathen Franz FerdinandThere Goes My Gun PixiesRock 'n' Roll Lifestyle Cake

Projection π(R)

π(Titre, Interprète)(morceaux)

Produit cartésien de deux tables

Titre Durée Interprète Album

Comanche 2:10 Cake Motorcade Of Generosity

Up So Close 3:14 Cake Motorcade Of Generosity

Man-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin

Man-Sized Wreath 2:33 R.E.M. Accelerate

This Boy 2:22 Franz Ferdinand You Could Have It So Much Better

Evil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better

There Goes My Gun 1:50 Pixies Doolittle

Rock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity

table morceaux

table albumsAlbum Interprète

Motorcade Of Generosity CakeFashion Nugget CakeLive At The Olympia In Dublin R.E.M.Accelerate R.E.M.Trompe le Monde PixiesYou Could Have It So Much Better Franz FerdinandDoolittle Pixies

x

Produit cartésien de deux tables

Titre Durée Interprète Album Album InterprèteComanche 2:10 Cake Motorcade Of Generosity Motorcade Of Generosity CakeUp So Close 3:14 Cake Motorcade Of Generosity Motorcade Of Generosity CakeMan-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin Motorcade Of Generosity CakeMan-Sized Wreath 2:33 R.E.M. Accelerate Motorcade Of Generosity CakeThis Boy 2:22 Franz Ferdinand You Could Have It So Much Better Motorcade Of Generosity CakeEvil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better Motorcade Of Generosity CakeThere Goes My Gun 1:50 Pixies Doolittle Motorcade Of Generosity CakeRock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity Motorcade Of Generosity CakeComanche 2:10 Cake Motorcade Of Generosity Fashion Nugget CakeUp So Close 3:14 Cake Motorcade Of Generosity Fashion Nugget CakeMan-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin Fashion Nugget CakeMan-Sized Wreath 2:33 R.E.M. Accelerate Fashion Nugget CakeThis Boy 2:22 Franz Ferdinand You Could Have It So Much Better Fashion Nugget CakeEvil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better Fashion Nugget CakeThere Goes My Gun 1:50 Pixies Doolittle Fashion Nugget CakeRock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity Live At The Olympia In Dublin R.E.M.Comanche 2:10 Cake Motorcade Of Generosity Live At The Olympia In Dublin R.E.M.Up So Close 3:14 Cake Motorcade Of Generosity Live At The Olympia In Dublin R.E.M.Man-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin Live At The Olympia In Dublin R.E.M.Man-Sized Wreath 2:33 R.E.M. Accelerate Live At The Olympia In Dublin R.E.M.This Boy 2:22 Franz Ferdinand You Could Have It So Much Better Live At The Olympia In Dublin R.E.M.Evil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better Live At The Olympia In Dublin R.E.M.There Goes My Gun 1:50 Pixies Doolittle Live At The Olympia In Dublin R.E.M.Rock 'n' Roll Lifestyle 4:14 Cake Motorcade Of Generosity Live At The Olympia In Dublin R.E.M.Comanche 2:10 Cake Motorcade Of Generosity Accelerate R.E.M.Up So Close 3:14 Cake Motorcade Of Generosity Accelerate R.E.M.

morceaux x albums

=

Produit cartésien de deux tables : problèmes

• Différencier les attributs : renommage

• Éliminer les éléments vides de sens : jointure

RenommageMorceaux.Titre Morceaux.Durée Morceaux.Interprète Morceaux.Album Albums.Album Albums.Interprète

Comanche 2:10 Cake Motorcade Of Generosity Motorcade Of Generosity Cake

Up So Close 3:14 Cake Motorcade Of Generosity Motorcade Of Generosity Cake

Man-Sized Wreath 3:09 R.E.M. Live At The Olympia In Dublin Motorcade Of Generosity Cake

Man-Sized Wreath 2:33 R.E.M. Accelerate Motorcade Of Generosity Cake

This Boy 2:22 Franz Ferdinand You Could Have It So Much Better Motorcade Of Generosity Cake

Evil And A Heathen 2:06 Franz Ferdinand You Could Have It So Much Better Motorcade Of Generosity Cake

There Goes My Gun 1:50 Pixies Doolittle Motorcade Of Generosity Cake

Jointureidentifiant Titre Durée Interprète Album

1 Comanche 2:10 1 1

2 Up So Close 3:14 1 1

3 Man-Sized Wreath 3:09 2 3

4 Man-Sized Wreath 2:33 2 4

5 This Boy 2:22 3 6

6 Evil And A Heathen 2:06 3 6

7 There Goes My Gun 1:50 4 7

8 Rock 'n' Roll Lifestyle 4:14 3 6

table morceaux

identifiant Nom

1 Cake

2 R.E.M.

3 Franz Ferdinand

4 Pixies

table interprètes

Condition : morceaux.Interprète = interprètes.identifiant

Jointureidentifiant Titre Durée Interprète Album identifiant Nom

1 Comanche 2:10 1 1 1 Cake

2 Up So Close 3:14 1 1 1 Cake

3 Man-Sized Wreath 3:09 2 3 2 R.E.M.

4 Man-Sized Wreath 2:33 2 4 2 R.E.M.

5 This Boy 2:22 3 6 3 Franz Ferdinand

6 Evil And A Heathen 2:06 3 6 3 Franz Ferdinand

7 There Goes My Gun 1:50 4 7 4 Pixies

8 Rock 'n' Roll Lifestyle 4:14 1 1 3 Franz Ferdinand

(morceaux.Interprète = interprètes.identifiant)

morceaux interprètes

Combinaison : séances des films avec H. Bogart