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Les requêtes
La sélection La mie à jour
Sélection
simple Paramétrés
Regroupement
Avec
Champs
calculés
La structure Les enregistrements
A/M/S
une
colonne
Créer une
table
Supprim
er une
table
A/M/S un
enregistre
ment
• SELECT Ch1, Ch2, …. Chn , Fct_Agregation
FROM T1, T2,….Tn
WHERE Jointures/Conditions
GROUP BY Champs existant dans (Select)
HAVING Conditions sur la Fct_Agregation
• Afficher (Nom, Prénom, Quantité totale) des
vendeurs qui ont vendu une quantité totale
supérieure à 10.
• SELECT Nom, Prénom, Sum(Qte_v) as [Quantité
totale]
FROM Vendeurs , Ventes
WHERE Vendeurs.Matricule=Ventes.Matricule
GROUP BY Nom, Prénom;
HAVING Sum(Qte_v)>10
Les requêtes
La sélection La mie à jour
Sélection
simple Paramétrés
Regroupement
Avec
Champs
calculés
La structure Les enregistrements
A/M/S
une
colonne
Créer une
table
Supprim
er une
table
A/M/S un
enregistre
ment
La Structure
• Créer une table:
CREATE TABLE nom_de_la_table (
Champs1 type_donnees Primary key Not null,
Champs2 type_donnees ,
ChampsN type_donnees
ADD CONSTRAINT NomContrainte FOREIGN KEY (CH1)
REFERENCES Table2(CH2);
)
La Structure
• Les contraintes: ( clé étrangère )
ALTER TABLE NomTable
ADD CONSTRAINT NomContrainte FOREIGN KEY (CH1)
REFERENCES Table2(CH2);
• Les contraintes: ( clé primaire)
ALTER TABLE NomTable
ADD CONSTRAINT NomContrainte PRIMARY KEY (CH1);
La Structure
• Supprimer une table
Drop table NomTable;
• Supprimer une contrainte
Drop constraint NomContrainte;
La Structure
• Ajout des champs
ALTER TABLE NomTable
ADD COLUMN NomCH TYPE;
• Modification le type d’une colonne
ALTER TABLE NomTable
ALTER COLUMN NomCH TYPE;
• Suppression d’une colonne
ALTER TABLE NomTable
DROP COLUMN NomCH ;
Les Enregistrements
• Ajout d’un enregistrement:
INSERT INTO NomTable (NomCH1,NomCH2,…,NomCHN)
VALUES (ValeurCh1, ValeurCh2,…, ValeurChN);
• Modification d’un enregistrement:
UPDATE NomTable
SET NomCH=NouvelleValeur
WHERE Conditions;
• Suppression d’un enregistrement
DELETE FROM NomTable
WHERE Conditions;

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Les requetes (1)

  • 1. Les requêtes La sélection La mie à jour Sélection simple Paramétrés Regroupement Avec Champs calculés La structure Les enregistrements A/M/S une colonne Créer une table Supprim er une table A/M/S un enregistre ment
  • 2. • SELECT Ch1, Ch2, …. Chn , Fct_Agregation FROM T1, T2,….Tn WHERE Jointures/Conditions GROUP BY Champs existant dans (Select) HAVING Conditions sur la Fct_Agregation
  • 3. • Afficher (Nom, Prénom, Quantité totale) des vendeurs qui ont vendu une quantité totale supérieure à 10. • SELECT Nom, Prénom, Sum(Qte_v) as [Quantité totale] FROM Vendeurs , Ventes WHERE Vendeurs.Matricule=Ventes.Matricule GROUP BY Nom, Prénom; HAVING Sum(Qte_v)>10
  • 4. Les requêtes La sélection La mie à jour Sélection simple Paramétrés Regroupement Avec Champs calculés La structure Les enregistrements A/M/S une colonne Créer une table Supprim er une table A/M/S un enregistre ment
  • 5. La Structure • Créer une table: CREATE TABLE nom_de_la_table ( Champs1 type_donnees Primary key Not null, Champs2 type_donnees , ChampsN type_donnees ADD CONSTRAINT NomContrainte FOREIGN KEY (CH1) REFERENCES Table2(CH2); )
  • 6. La Structure • Les contraintes: ( clé étrangère ) ALTER TABLE NomTable ADD CONSTRAINT NomContrainte FOREIGN KEY (CH1) REFERENCES Table2(CH2); • Les contraintes: ( clé primaire) ALTER TABLE NomTable ADD CONSTRAINT NomContrainte PRIMARY KEY (CH1);
  • 7. La Structure • Supprimer une table Drop table NomTable; • Supprimer une contrainte Drop constraint NomContrainte;
  • 8. La Structure • Ajout des champs ALTER TABLE NomTable ADD COLUMN NomCH TYPE; • Modification le type d’une colonne ALTER TABLE NomTable ALTER COLUMN NomCH TYPE; • Suppression d’une colonne ALTER TABLE NomTable DROP COLUMN NomCH ;
  • 9. Les Enregistrements • Ajout d’un enregistrement: INSERT INTO NomTable (NomCH1,NomCH2,…,NomCHN) VALUES (ValeurCh1, ValeurCh2,…, ValeurChN); • Modification d’un enregistrement: UPDATE NomTable SET NomCH=NouvelleValeur WHERE Conditions; • Suppression d’un enregistrement DELETE FROM NomTable WHERE Conditions;