ajout des BDD et des maths

BDD/tp/BDDs2/tp1/requetes_tp9.sql

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+-- 2. Ecrire un bloc PL/pgSQL anonyme qui affiche
+
+DO $$
+    DECLARE
+        a numeric := 0;
+        b numeric := 1;
+        c numeric;
+        i integer := 0;
+    BEGIN
+        WHILE i<10 LOOP
+            c=a+b;
+            RAISE NOTICE 'a=% b=% c=%', a, b, c;
+            a=b;
+            b=c;
+            i=i+1;
+        END LOOP;
+    END;
+$$;
+
+-- 3. Faire la meme mais en fonction pgSQL
+
+CREATE OR REPLACE FUNCTION fibonacci(n integer) RETURNS SETOF integer AS $$
+    DECLARE
+        a numeric := 0;
+        b numeric := 1;
+        c numeric;
+        i integer := 0;
+    BEGIN
+        WHILE i<(n-1) LOOP
+            c=a+b;
+            -- RAISE NOTICE 'a=% b=% c=%', a, b, c;
+            a=b;
+            b=c;
+            i=i+1;
+            RETURN NEXT c;
+        END LOOP;
+    END;
+$$ LANGUAGE plpgsql;
+
+-- 4. Appel de la fonction avec comme parametre 0, 1, 2, 10
+
+SELECT fibonacci(0);
+SELECT * FROM fibonacci(1);
+SELECT * FROM fibonacci(2);
+SELECT * FROM fibonacci(10);
+
+-- fibonacci 
+-- -----------
+-- (0 ligne)
+
+--  fibonacci 
+-- -----------
+-- (0 ligne)
+
+--  fibonacci 
+-- -----------
+--          1
+-- (1 ligne)
+
+--  fibonacci 
+-- -----------
+--          1
+--          2
+--          3
+--          5
+--          8
+--         13
+--         21
+--         34
+--         55
+-- (9 lignes)
+
+
+
+-- 5. Ecrire une fonction en plpgsql nb_athletes qui retourn le nombre d'athlètes d'un pays dont le code est passé en paramètre
+
+CREATE OR REPLACE FUNCTION nb_athletes(pays_code character varying) RETURNS integer AS $$
+    DECLARE
+        nb_athletes integer;
+    BEGIN
+        SELECT COUNT(*) INTO nb_athletes FROM athlete WHERE pays = pays_code;
+        RETURN nb_athletes;
+    END;
+$$ LANGUAGE plpgsql;
+
+-- 6. Utiliser la fonction précédente pour calculer le nombre d'athlèthes français
+
+SELECT nb_athletes('FRA');
+
+-- nb_athletes 
+-- -------------
+--          396
+-- (1 ligne)
+
+
+-- 7. Ecrire une requete sql utilisant la fonction nb_athletes pour afficher le code et le nom de tous les pays ayant plus d'athlètes que la France
+
+SELECT pays, nom FROM pays WHERE nb_athletes(pays.code) > nb_athletes('FRA');
+
+-- pays                |            nom             
+-- ------------------------------------+----------------------------
+--  (AUS,Australia)                    | Australia
+--  (USA,"United States of America")   | United States of America
+--  (GER,Germany)                      | Germany
+--  (JPN,Japan)                        | Japan
+--  (CHN,"People's Republic of China") | People's Republic of China
+-- (5 lignes)
+
+-- 8. Ecrire une fonction en pgpsql epr qui prend deux paramètres (le nom d'une discipline et une date) et qui retourne les epreuves (code et nom) de cette discipline ayant lieu à la date donnée
+
+CREATE OR REPLACE FUNCTION epr(discipline varchar, date date) RETURNS SETOF epreuve AS $$
+    DECLARE
+        epreuve epreuve;
+    BEGIN
+        FOR epreuve IN SELECT * 
+                        FROM epreuve e, discipline d
+                        WHERE e.discipl = d.code AND e.dateE = date LOOP
+            RETURN NEXT epreuve;
+        END LOOP;
+    END;
+$$ LANGUAGE plpgsql;
+
+-- %TYPE pour recuperer le type de la colonne
+
+-- 9. Utiliser la fonction epr pour afficher les noms des epreuves d'athlètisme ('Athletics') ayant lieu le 3 août 2021
+
+SELECT epr('Athletics', '2021-08-03');
+
+-- epr                                  
+-- ----------------------------------------------------------------------
+--  (E206,GAR,"Men's Horizontal Bar",2021-08-03)
+--  (E207,GAR,"Men's Parallel Bars",2021-08-03)
+--  (E208,GAR,"Women's Balance Beam",2021-08-03)
+--  (E209,ATH,"Men's 400m Hurdles",2021-08-03)
+--  (E210,ATH,"Men's Pole Vault",2021-08-03)
+--  (E211,ATH,"Women's 200m",2021-08-03)
+--  (E212,ATH,"Women's 800m",2021-08-03)
+--  (E213,ATH,"Women's Hammer Throw",2021-08-03)
+--  (E214,ATH,"Women's Long Jump",2021-08-03)
+--  (E215,BOX,"Men's Feather (52-57kg)",2021-08-03)
+--  (E216,BOX,"Men's Heavy (81-91kg)",2021-08-03)
+--  (E217,BOX,"Men's Welter (63-69kg)",2021-08-03)
+--  (E218,BOX,"Women's Feather (54-57kg)",2021-08-03)
+--  (E219,CSP,"Men's Canoe Double 1000m",2021-08-03)
+--  (E220,CSP,"Men's Kayak Single 1000m",2021-08-03)
+--  (E221,CSP,"Women's Kayak Double 500m",2021-08-03)
+--  (E222,CSP,"Women's Kayak Single 200m",2021-08-03)
+--  (E223,CTR,"Men's Team Sprint",2021-08-03)
+--  (E224,CTR,"Women's Team Pursuit",2021-08-03)
+--  (E225,DIV,"Men's 3m Springboard",2021-08-03)
+--  (E226,SAL,"Men's One Person Dinghy (Heavyweight) - Finn",2021-08-03)
+--  (E227,SAL,"Men's Skiff - 49er",2021-08-03)
+--  (E228,SAL,"Mixed Multihull - Nacra 17 Foiling",2021-08-03)
+--  (E229,SAL,"Women's Skiff - 49er FX",2021-08-03)
+--  (E230,WLF,"Men's 109kg",2021-08-03)
+--  (E231,WRE,"Men's Greco-Roman 77kg",2021-08-03)
+--  (E232,WRE,"Men's Greco-Roman 97kg",2021-08-03)
+--  (E233,WRE,"Women's Freestyle 68kg",2021-08-03)
+-- (28 lignes)
+
+-- 10. Le mauvais temps empêche la tenue de compétition en exterieur. Utiliser la fonction epr pour décaler d'un jour toutes les epreuves d'équitation ('Equestrian') ayant lieu le 2 août 2021
+
+SELECT epr('Equestrian', '2021-08-02');
+
+-- epr                        
+-- ---------------------------------------------------
+--  (E186,GAR,"Men's Rings",2021-08-02)
+--  (E187,GAR,"Men's Vault",2021-08-02)
+--  (E188,GAR,"Women's Floor Exercise",2021-08-02)
+--  (E189,ATH,"Men's 3000m Steeplechase",2021-08-02)
+--  (E190,ATH,"Men's Long Jump",2021-08-02)
+--  (E191,ATH,"Women's 100m Hurdles",2021-08-02)
+--  (E192,ATH,"Women's 5000m",2021-08-02)
+--  (E193,ATH,"Women's Discus Throw",2021-08-02)
+--  (E194,BDM,"Men's Singles",2021-08-02)
+--  (E195,BDM,"Women's Doubles",2021-08-02)
+--  (E196,CTR,"Women's Team Sprint",2021-08-02)
+--  (E197,EQU,"Eventing Individual",2021-08-02)
+--  (E198,EQU,"Eventing Team",2021-08-02)
+--  (E199,SHO,"25m Rapid Fire Pistol Men",2021-08-02)
+--  (E200,SHO,"50m Rifle 3 Positions Men",2021-08-02)
+--  (E201,WLF,"Women's +87kg",2021-08-02)
+--  (E202,WLF,"Women's 87kg",2021-08-02)
+--  (E203,WRE,"Men's Greco-Roman 130kg",2021-08-02)
+--  (E204,WRE,"Men's Greco-Roman 60kg",2021-08-02)
+--  (E205,WRE,"Women's Freestyle 76kg",2021-08-02)
+-- (20 lignes)
+
+-- UPDATE 0
+
+-- 11. Ecrire une fonction pratique qui retourne le nom de la discipline pratiqué par un athlète dont on passe le code en paramètre
+
+CREATE OR REPLACE FUNCTION pratique(code_athlete athlete.code%TYPE) RETURNS SETOF discipline AS $$
+    DECLARE
+        discipline discipline;
+    BEGIN
+        FOR discipline IN SELECT * FROM discipline d WHERE d.code IN (SELECT p.discipl FROM pratiquer p WHERE p.athlete = (SELECT a.code FROM athlete a WHERE a.nom = nom AND a.prenom = prenom)) LOOP
+            RETURN NEXT discipline;
+        END LOOP;
+    EXCEPTION
+        WHEN UNIQUE_VIOLATION THEN
+            RAISE NOTICE 'L ''athlète % pratique plusieurs disciplines', code_athlete;
+        WHEN NO_DATA_FOUND THEN
+            RAISE NOTICE 'Athlète % inconnu', code_athlete;
+    END;
+$$ LANGUAGE plpgsql;
+
+-- CREATE OR REPLACE FUNCTION pratique(code_athlete varchar) RETURNS SETOF discipline AS $$
+--     SELECT * 
+--     FROM discipline d 
+--     WHERE d.code IN (SELECT discipl FROM pratiquer WHERE athlete = code_athlete);
+--     EXEPTION
+--         WHEN UNIQUE_VIOLATION THEN
+--             RAISE NOTICE 'L ''athlète % pratique plusieurs disciplines', code_athlete;
+--         WHEN NO_DATA_FOUND THEN
+--             RAISE NOTICE 'Athlète % inconnu', code_athlete;
+-- $$ LANGUAGE SQL;
+
+-- 12. Utiliser la fonction pratique pour trouver le sport pratiqué par Earvin NGAPETH
+
+SELECT code 
+FROM athlete 
+WHERE nom = 'NGAPETH' AND prenom = 'Earvin';
+
+SELECT * FROM pratique('A07318');
+
+-- code |    nom     
+-- ------+------------
+--  VVO  | Volleyball
+-- (1 ligne)
+
+-- 13. Meme question pour l'athlete Lotte KOPECKY
+
+SELECT code
+FROM athlete
+WHERE nom = 'KOPECKY' AND prenom = 'Lotte';
+
+SELECT * FROM pratique('A05315');
+
+-- code |      nom      
+-- ------+---------------
+--  CRD  | Cycling Road
+--  CTR  | Cycling Track
+-- (2 lignes)
+
+-- 14. Meme question pour l'thlete de code 'B01' (qui n'existe pas)
+
+SELECT * FROM pratique('B01');
+
+
+