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Tutorium_5_complex sql statements für Tutorium 5

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Jacob Fritsche
2025-02-09 12:29:36 +01:00
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--
-- connection of inner, left and right joins. See slide 9
--
SELECT cntry.name
,prv.name
,gm.mountain
,brds.country1
FROM "IDBS01_Q12025"."Country" cntry
INNER JOIN "IDBS01_Q12025"."Province" prv
ON cntry.code = prv.country
LEFT OUTER JOIN "IDBS01_Q12025"."geo_Mountain" gm
ON prv.country = gm.country
AND prv."name" = gm.province
RIGHT OUTER JOIN "IDBS01_Q12025"."borders" brds
ON brds.country1 = cntry.code
limit 10;
--
-- Difference UNION and UNION ALL
--
SELECT cntry.name
FROM "IDBS01_Q12025"."Country" cntry
UNION
SELECT cntry.name
FROM "IDBS01_Q12025"."Country" cntry
ORDER BY 1
limit 10;
--
-- Transferaufgabe
--
--
-- Aufgabe 1
--
SELECT city."name" AS Stadtname
,city.population AS Bevoelkerung
FROM "IDBS01_Q12025"."Country" cntry
RIGHT OUTER JOIN "IDBS01_Q12025"."City" city
ON cntry.code = city.country
WHERE cntry."name" = 'Austria'
;
--
-- Aufgabe 2
--
SELECT borderCnrty."name" AS Grenzland
,borderCnrty.population AS Bevoelkerung
FROM "IDBS01_Q12025"."Country" cntry
INNER JOIN "IDBS01_Q12025"."borders" brds1
ON brds1.country1 = cntry.code
INNER JOIN "IDBS01_Q12025"."Country" borderCnrty
ON borderCnrty.code = brds1.country2
WHERE cntry."name" = 'Germany'
ORDER BY brds1.length DESC
;
--
-- Aufgabe 3
--
CREATE VIEW "IDBS01_Q12025"."BorderCountry" AS
SELECT borderCnrty."name" AS Grenzland
,borderCnrty.population AS Bevoelkerung
FROM "IDBS01_Q12025"."Country" cntry
INNER JOIN "IDBS01_Q12025"."borders" brds1
ON brds1.country1 = cntry.code
INNER JOIN "IDBS01_Q12025"."Country" borderCnrty
ON borderCnrty.code = brds1.country2
WHERE cntry."name" = 'Germany'
ORDER BY brds1.length DESC
;
--
-- Aufgabe 4
--
SELECT *
FROM "IDBS01_Q12025"."borders"
WHERE country1 = 'BY'
;
START TRANSACTION;
INSERT INTO "IDBS01_Q12025"."borders" (Country1, Country2, Length) VALUES ('PL','BY',605);
INSERT INTO "IDBS01_Q12025"."borders" (Country1, Country2, Length) VALUES ('BY','PL',605);
COMMIT;
START TRANSACTION;
DELETE FROM "IDBS01_Q12025"."borders"
WHERE country1 = 'PL'
AND country2 = 'BY'
;
DELETE FROM "IDBS01_Q12025"."borders"
WHERE country1 = 'BY'
AND country2 = 'PL'
;
COMMIT;
--
-- Aufgabe 5
--
SELECT *
FROM "IDBS01_Q12025"."Country" cntry
WHERE cntry.code = 'EAU'
;
START TRANSACTION;
UPDATE "IDBS01_Q12025"."Country" SET Population = 44270000 WHERE Code = 'EAU';
COMMIT;
START TRANSACTION;
UPDATE "IDBS01_Q12025"."Country" SET Population = 20158176 WHERE Code = 'EAU';
COMMIT;
--
-- Aufgabe 6
--
CREATE TABLE "IDBS01_Q12025"."BevoelklerungNeu"
(ID INTEGER
,LandCode VARCHAR(4)
,datum DATE
,population INTEGER
,PRIMARY KEY(ID))
;
DROP TABLE "IDBS01_Q12025"."BevoelklerungNeu";