
Raman
Authored by Raman Movlodi
Computers
Professional Development
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Wählen Sie die korrekte Abfrage aus, um alle Länder zu finden, deren Bevölkerung über dem Durchschnitt der jeweiligen Region liegt.
SELECT Name FROM Länder WHERE Einwohner > AVG(Einwohner)
SELECT Name FROM Länder WHERE Einwohner > (SELECT AVG(Einwohner) FROM Länder)
SELECT Name FROM Länder GROUP BY Region HAVING Einwohner > AVG(Einwohner)
SELECT Name FROM Länder L1 WHERE Einwohner > (SELECT AVG(Einwohner) FROM Länder L2 WHERE L1.Region = L2.Region)
2.
OPEN ENDED QUESTION
3 mins • 1 pt
Schreiben Sie eine SQL-Abfrage, um die drei am dichtesten besiedelten Länder in jeder Region anzuzeigen.
Evaluate responses using AI:
OFF
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche SQL-Abfrage gibt die Gesamtzahl der Einwohner für jede Region zurück, wobei nur Regionen mit einem durchschnittlichen BIP von über 1 Trillion einbezogen werden?
SELECT Region, SUM(Einwohner) FROM Länder GROUP BY Region HAVING AVG(BIP) > 1000000000000
SELECT Region, SUM(Einwohner) FROM Länder WHERE AVG(BIP) > 1000000000000 GROUP BY Region
SELECT Region, SUM(Einwohner) FROM Länder GROUP BY Region HAVING SUM(BIP) > 1000000000000
SELECT Region, COUNT(*) FROM Länder GROUP BY Region HAVING AVG(BIP) > 1000000000000
4.
OPEN ENDED QUESTION
3 mins • 1 pt
Formulieren Sie eine SQL-Anweisung, um alle Länder zu finden, deren BIP größer ist als das BIP jedes anderen Landes in ihrer Region.
Evaluate responses using AI:
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5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche Abfrage gibt die Regionen zurück, in denen die Summe der BIPs aller Länder mehr als das Doppelte des durchschnittlichen BIPs aller Länder weltweit ist?
SELECT Region FROM Länder GROUP BY Region HAVING SUM(BIP) > 2 * AVG(BIP)
SELECT Region FROM Länder GROUP BY Region HAVING SUM(BIP) > 2 * (SELECT AVG(BIP) FROM Länder)
SELECT Region FROM Länder GROUP BY Region HAVING SUM(BIP) > 2 * (SELECT SUM(BIP) FROM Länder) / COUNT(DISTINCT Region)
SELECT Region FROM Länder GROUP BY Region HAVING AVG(BIP) > 2 * (SELECT AVG(BIP) FROM Länder)
6.
OPEN ENDED QUESTION
3 mins • 1 pt
Schreiben Sie eine SQL-Abfrage, um den Namen des Landes mit der kleinsten Bevölkerung in jeder Region zu finden.
Evaluate responses using AI:
OFF
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche Abfrage gibt die Länder zurück, deren BIP pro Kopf unter den Top 10 der Welt liegt?
SELECT Name FROM Länder ORDER BY BIP/Einwohner DESC LIMIT 10
SELECT Name FROM (SELECT Name, RANK() OVER (ORDER BY BIP/Einwohner DESC) AS Rank FROM Länder) WHERE Rank <= 10
SELECT Name FROM Länder WHERE BIP/Einwohner IN (SELECT BIP/Einwohner FROM Länder ORDER BY BIP/Einwohner DESC LIMIT 10)
SELECT Name FROM Länder L1 WHERE 10 > (SELECT COUNT(DISTINCT L2.BIP/Einwohner) FROM Länder L2 WHERE L2.BIP/Einwohner > L1.BIP/Einwohner)
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