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/*
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=> TP 2, Fréville Clément G8
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*/
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-- 1. Nombre d’athlètes par pays.
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SELECT p.nom pays, COUNT(*) athletes FROM athlete a
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INNER JOIN pays p ON p.code = a.pays
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GROUP BY p.code;
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/*
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pays | athletes
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----------------------------------+----------
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Ethiopia | 37
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Kuwait | 10
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Denmark | 108
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Nauru | 2
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Netherlands | 283
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Palau | 3
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Samoa (until 1996 Western Samoa) | 8
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United Arab Emirates | 5
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[...]
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*/
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-- 2. Nombre d’épreuves par discipline.
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SELECT d.nom discipline, COUNT(*) nombre_epreuves FROM epreuve e
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INNER JOIN discipline d ON d.code = e.discipl
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GROUP BY d.code;
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/*
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discipline | nombre_epreuves
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-----------------------+-----------------
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Equestrian | 6
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Taekwondo | 8
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Hockey | 2
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Volleyball | 2
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Sport Climbing | 2
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Skateboarding | 4
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Handball | 2
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Baseball/Softball | 2
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Diving | 8
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[...]
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*/
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-- 3. Date de la dernière épreuve de chaque discipline.
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SELECT d.nom, to_char(MAX(e.dateE), 'dd/mm/YYYY') derniere_epreuve FROM epreuve e
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INNER JOIN discipline d ON d.code = e.discipl
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GROUP BY d.code;
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/*
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nom | derniere_epreuve
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-----------------------+------------------
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Equestrian | 07/08/2021
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Taekwondo | 27/07/2021
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Hockey | 06/08/2021
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Volleyball | 08/08/2021
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Sport Climbing | 06/08/2021
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Skateboarding | 05/08/2021
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Handball | 08/08/2021
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Baseball/Softball | 07/08/2021
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[...]
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*/
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-- 4. Date de naissance du plus jeune athlète par discipline et par sexe.
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SELECT d.nom discipline, a.sexe, MAX(a.dateNaiss) date_naissance_plus_jeune FROM athlete a
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INNER JOIN pratiquer p ON p.athlete = a.code
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INNER JOIN discipline d ON p.discipl = d.code
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WHERE a.dateNaiss IS NOT NULL
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GROUP BY d.code, a.sexe;
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/*
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discipline | sexe | date_naissance_plus_jeune
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-----------------------+------+---------------------------
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Basketball | M | 2002-03-09
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Water Polo | F | 2004-10-29
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Water Polo | M | 2003-06-02
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Athletics | M | 2004-01-29
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Rhythmic Gymnastics | F | 2004-11-29
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Equestrian | F | 1998-08-19
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Modern Pentathlon | M | 2000-03-01
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Triathlon | M | 1999-10-07
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Hockey | M | 2002-03-19
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Football | M | 2003-07-24
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Swimming | M | 2005-07-19
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[...]
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*/
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-- 5. Nombre total de médailles par pays, les pays ayant remporté le plus de médailles en premier.
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SELECT p.nom pays, COUNT(*) medailles_remportees FROM resultat r
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INNER JOIN athlete a ON a.code = r.athlete
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INNER JOIN pays p ON p.code = a.pays
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GROUP BY p.code
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ORDER BY medailles_remportees DESC;
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/*
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pays | medailles_remportees
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----------------------------+----------------------
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United States of America | 295
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ROC | 147
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People's Republic of China | 140
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France | 137
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Japan | 131
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Great Britain | 130
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Australia | 129
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Canada | 82
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[...]
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*/
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-- 6. Nombre de médailles d’or par pays, les pays ayant remporté le plus de médailles en premier.
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SELECT p.nom pays, COUNT(*) medailles_or_remportees FROM resultat r
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INNER JOIN athlete a ON a.code = r.athlete
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INNER JOIN pays p ON p.code = a.pays
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WHERE r.medaille = 1
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GROUP BY p.code, r.medaille
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ORDER BY medailles_or_remportees DESC;
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/*
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pays | medailles_or_remportees
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----------------------------+-------------------------
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United States of America | 112
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Japan | 68
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France | 65
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People's Republic of China | 58
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ROC | 40
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Great Britain | 39
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Australia | 36
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Canada | 36
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Netherlands | 31
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Brazil | 29
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[...]
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*/
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-- 7. Même question, mais uniquement les pays ayant remporté plus de 30 médailles d’or
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SELECT p.nom, COUNT(*) medailles_or_remportees FROM resultat r
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INNER JOIN athlete a ON a.code = r.athlete
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INNER JOIN pays p ON p.code = a.pays
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WHERE r.medaille = 1
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GROUP BY p.nom, r.medaille
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HAVING COUNT(*) >= 30
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ORDER BY medailles_or_remportees DESC;
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/*
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nom | medailles_or_remportees
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----------------------------+-------------------------
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United States of America | 112
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Japan | 68
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France | 65
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People's Republic of China | 58
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ROC | 40
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Great Britain | 39
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Australia | 36
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Canada | 36
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Netherlands | 31
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*/
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-- 8. Athlètes (code, nom, prénom, code du pays) pratiquant plusieurs disciplines.
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SELECT a.code, a.nom, a.prenom, a.pays
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FROM pratiquer p
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INNER JOIN athlete a ON a.code = p.athlete
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GROUP BY a.code, a.nom, a.prenom, a.pays
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HAVING COUNT(*) > 1;
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/*
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code | nom | prenom | pays
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--------+----------------+------------+------
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A05315 | KOPECKY | Lotte | BEL
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A01327 | BRENNAUER | Lisa | GER
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A07786 | PALTRINIERI | Gregorio | ITA
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A05148 | KIRPICHNIKOVA | Anastasiia | ROC
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A02686 | DYGERT | Chloe | USA
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A10627 | VAN ROUWENDAAL | Sharon | NED
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A00622 | AUBRY | David | FRA
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A05189 | KLEIN | Lisa | GER
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A03293 | GANNA | Filippo | ITA
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A11041 | WELLBROCK | Florian | GER
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A03991 | HAVIK | Yoeri | NED
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*/
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-- 9. Athlètes (code, nom, prénom, code du pays) ayant remporté quatre médailles.
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SELECT a.code, a.nom, a.prenom, a.pays
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FROM resultat r
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INNER JOIN athlete a ON a.code = r.athlete
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GROUP BY a.code
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HAVING COUNT(*) = 4;
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/*
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code | nom | prenom | pays
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--------+---------+----------+------
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A11582 | ZHANG | Yufei | CHN
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A09215 | SCOTT | Duncan | GBR
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A10225 | TITMUS | Ariarne | AUS
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A06581 | McKEOWN | Kaylee | AUS
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A05668 | LEDECKY | Kathleen | USA
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*/
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-- 10. Nombre d’athlètes mineurs au début des Jeux Olympiques (le 23 juillet 2021) par discipline,uniquement pour les disciplines ayant au moins trois athlètes mineurs.
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SELECT d.nom discipline, COUNT(*) athletes_mineurs
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FROM pratiquer p
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INNER JOIN athlete a ON a.code = p.athlete
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INNER JOIN discipline d ON d.code = p.discipl
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WHERE (('2021-07-23'-dateNaiss) / 365.2422) < 18
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GROUP BY d.code
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HAVING COUNT(*) > 2;
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/*
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discipline | athletes_mineurs
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---------------------+------------------
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Diving | 10
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Skateboarding | 18
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Artistic Swimming | 3
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Athletics | 6
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Artistic Gymnastics | 15
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Table Tennis | 3
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Swimming | 72
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Rhythmic Gymnastics | 8
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Shooting | 3
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Sailing | 5
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Archery | 4
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*/
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-- 11. Pays ayant le plus d’athlètes.
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SELECT pays, COUNT(*) athletes
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FROM athlete a
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GROUP BY a.pays
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ORDER BY athletes DESC
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LIMIT 1;
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/*
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pays | athletes
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------+----------
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USA | 633
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*/
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-- 11. (Variante) Pays ayant le plus d’athlètes.
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SELECT pays, COUNT(*) athletes
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FROM athlete a
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GROUP BY a.pays
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HAVING COUNT(*) = (
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SELECT MAX(c) FROM (
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SELECT COUNT(*) c
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FROM athlete
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GROUP BY pays
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) n_athletes
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);
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/*
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pays | athletes
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------+----------
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USA | 633
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*/
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-- 12. Athlète (nom, prénom, code pays) ayant remporté le plus de médailles.
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SELECT a.nom, a.prenom, a.pays, COUNT(*) medailles_remportees FROM resultat r
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INNER JOIN athlete a ON a.code = r.athlete
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GROUP BY a.code
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ORDER BY medailles_remportees DESC
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LIMIT 1;
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/*
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nom | prenom | pays | medailles_remportees
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--------+--------+------+----------------------
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McKEON | Emma | AUS | 7
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*/
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-- 12. (Variante) Athlète (nom, prénom, code pays) ayant remporté le plus de médailles.
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SELECT a.nom, a.prenom, a.pays, COUNT(*) medailles_remportees
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FROM resultat r
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INNER JOIN athlete a ON a.code = r.athlete
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GROUP BY a.code
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HAVING COUNT(*) = (
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SELECT MAX(c) FROM (
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SELECT COUNT(*) c
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FROM resultat
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GROUP BY athlete
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) n_resultats
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);
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/*
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nom | prenom | pays | medailles_remportees
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--------+--------+------+----------------------
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McKEON | Emma | AUS | 7
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*/
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