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Refactor les requêtes SQL pour utiliser des jointures explicites dans TP2.sql

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Arthur Danjou
2025-10-09 12:13:16 +02:00
parent fe8be01369
commit 9fc0fad1ef
1 changed files with 22 additions and 14 deletions
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36
M2/SQL/scripts/TP2.sql
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@@ -102,8 +102,10 @@ JOIN Employe dir ON d.Directeur = dir.Eno;
SELECT 'Q2.12';
SELECT e.Enom, e.Date_Emb, d.Dnom, dir.Enom AS Directeur, dir.Date_Emb as 'Embauche Directeur'
FROM Employe e, Departement d, Employe dir
WHERE e.Dep = d.Dno AND d.Directeur = dir.Eno AND dir.Date_Emb > e.Date_Emb;
FROM Employe e
JOIN Departement d ON e.Dep = d.Dno
JOIN Employe dir ON d.Directeur = dir.Eno
WHERE dir.Date_Emb > e.Date_Emb;
-- Q2.13
SELECT 'Q2.13';
@@ -159,12 +161,13 @@ SELECT 'Q2.19';
INSERT INTO Employe VALUES (80, 'Dominique', 'Technicien', '2010-03-01', 2900, 2000, 2);
SELECT e.Enom, e.Date_Emb FROM Employe e, Departement d
WHERE e.Dep = d.Dno
AND d.Dnom = 'Ventes'
SELECT e.Enom, e.Date_Emb FROM Employe e
JOIN Departement d ON e.Dep = d.Dno
WHERE d.Dnom = 'Ventes'
AND e.Date_Emb IN (
SELECT e2.Date_Emb FROM Employe e2, Departement d2
WHERE e2.Dep = d2.Dno AND d2.Dnom = 'Production'
SELECT e2.Date_Emb FROM Employe e2
JOIN Departement d2 ON e2.Dep = d2.Dno
WHERE d2.Dnom = 'Production'
);
-- Q2.20
@@ -186,11 +189,14 @@ WHERE e.Date_Emb < (
-- Q2.21
SELECT 'Q2.21';
SELECT e.Enom, e.Prof, d.Directeur FROM Employe e, Departement d
WHERE e.Dep = d.Dno AND e.Prof = (
SELECT e.Enom, e.Prof, d.Directeur FROM Employe e
JOIN Departement d ON e.Dep = d.Dno
WHERE e.Prof = (
SELECT Prof FROM Employe WHERE Enom = 'Claire'
) AND d.Directeur = (
SELECT dep_claire.Directeur FROM Employe c, Departement dep_claire WHERE c.Enom = 'Claire' AND c.Dep = dep_claire.Dno
SELECT dep_claire.Directeur FROM Employe c
JOIN Departement dep_claire ON c.Dep = dep_claire.Dno
WHERE c.Enom = 'Claire'
);
-- Q2.22
@@ -212,13 +218,15 @@ SELECT AVG(e.Salaire) AS Salaire_Moyen FROM Employe e;
-- Q2.25
SELECT 'Q2.25';
SELECT Count(*) as Nb_Employes FROM Employe e, Departement d
WHERE e.Dep = d.Dno AND d.Dnom = 'Production';
SELECT Count(*) as Nb_Employes FROM Employe e
JOIN Departement d ON e.Dep = d.Dno
WHERE d.Dnom = 'Production';
-- Q2.26
SELECT 'Q2.26';
SELECT e.Enom, d.Dnom FROM Employe e, Departement d
WHERE e.Dep = d.Dno AND e.Salaire >= (
SELECT e.Enom, d.Dnom FROM Employe e
JOIN Departement d ON e.Dep = d.Dno
WHERE e.Salaire >= (
SELECT MAX(e2.Salaire) FROM Employe e2 WHERE e2.Dep = d.Dno
)