Nested SELECT Quiz/ja

ネストした SELECT クイズ

bbc

name	region	area	population	gdp
Afghanistan	South Asia	652225	26000000
Albania	Europe	28728	3200000	6656000000
Algeria	Middle East	2400000	32900000	75012000000
Andorra	Europe	468	64000
Bangladesh	South Asia	143998	152600000	67144000000
United Kingdom	Europe	242514	59600000	2022824000000
...

各地域 region で最小の人口population を持つ国の、name, region, population を表示するコードを選べ。

 SELECT region, name, FROM bbc x WHERE population <= ALL (SELECT population FROM bbc y WHERE y.region=x.region AND population>0)

 SELECT region, name, population FROM bbc WHERE population <= ALL (SELECT population FROM bbc WHERE population>0)

 SELECT region, name, population FROM bbc x WHERE population <= ALL (SELECT population FROM bbc y WHERE y.region=x.region AND population>0)

 SELECT region, name, population FROM bbc x WHERE population = ALL (SELECT population FROM bbc y WHERE y.region=x.region AND population>0)

 SELECT region, name, population FROM bbc x WHERE population <= ALL (SELECT population FROM bbc y WHERE y.region=x.region AND population<0)

その地区の全ての国が50000人を超える様な国を表示するコードを選べ。

 SELECT name,region,population FROM bbc x WHERE 50000 < ALL (SELECT population FROM bbc y WHERE population>0)

 SELECT name,region,population FROM bbc x WHERE 50000 < ALL (SELECT population FROM bbc y WHERE x.region=y.region AND y.population>0)

 SELECT name,region,population FROM bbc x WHERE 50000 = ALL (SELECT population FROM bbc y WHERE x.region=y.region AND y.population>0)

 SELECT name,region,population FROM bbc x WHERE 50000 > ALL (SELECT population FROM bbc y WHERE x.region=y.region AND y.population>0)

 SELECT name,region,population FROM bbc x WHERE 500000 < ALL (SELECT population FROM bbc y WHERE x.region=y.region AND y.population>0)

その国がある地域の他の国の3分の1より小さな人口の国を表示するコードを選べ。

SELECT name, region FROM bbc x
 WHERE population < ALL (SELECT population/3 FROM bbc y WHERE y.region = x.region AND y.name != x.name)

SELECT name, region FROM bbc x
 WHERE population = ALL (SELECT population/3 FROM bbc y WHERE y.region = x.region AND y.name != x.name)

SELECT name, region FROM bbc x
 WHERE population > ALL (SELECT population/3 FROM bbc y WHERE y.region = x.region AND y.name != x.name)

 SELECT name, region FROM bbc x WHERE population < ALL (SELECT population*3 FROM bbc y WHERE y.region = x.region AND y.name != x.name)

 SELECT name, region FROM bbc x WHERE population < ALL (SELECT population/3 FROM bbc y WHERE y.name != x.name)

次のコードの実行結果を選べ

SELECT name FROM bbc
 WHERE population >
       (SELECT population
          FROM bbc
         WHERE name='United Kingdom')
   AND region IN
       (SELECT region
          FROM bbc
         WHERE name = 'United Kingdom')

Table-A

Andorra

Albania

Austria

Bulgaria

Table-B

France	Europe
Germany	Europe
Russia	Europe
Turkey	Europe

Table-C

France

Germany

Andorra

Albania

Table-D

France

Germany

Russia

Turkey

Table-E

France

Germany

Russia

Turkey

Brazil

United States of USA

Canada

アフリカAfrica のどの国のGDPよりも大きなGDPを持つ国を表示するコードを選べ。

SELECT name FROM bbc
 WHERE gdp > ALL (SELECT MAX(gdp) FROM bbc WHERE region = 'Africa' AND gdp=0)

SELECT name FROM bbc
 WHERE gdp > (SELECT MAX(gdp) FROM bbc WHERE region = 'Africa')

SELECT name FROM bbc
 WHERE gdp > ALL (SELECT MIN(gdp) FROM bbc WHERE region = 'Africa')

SELECT name FROM bbc
 WHERE gdp > ALL (SELECT gdp FROM bbc WHERE region = 'Africa')

SELECT name FROM bbc
 WHERE gdp > ALL (SELECT gdp FROM bbc WHERE region = 'Africa' AND gdp<>NULL)

ロシアRussia　よりも小さく、デンマークDenmark　よりも大きな人口を持つ国を表示するコードを選べ。

SELECT name FROM bbc
 WHERE population < (SELECT population FROM bbc WHERE name='Denmark')
   AND population > (SELECT population FROM bbc WHERE name='Russia')

SELECT name FROM bbc
 WHERE population < (SELECT population FROM bbc WHERE name='Russia')
   AND population > (SELECT population FROM bbc WHERE name='Denmark')

SELECT name FROM bbc
 WHERE population = (SELECT population FROM bbc WHERE name='Russia')
   AND population > (SELECT population FROM bbc WHERE name='Denmark')

SELECT name FROM bbc
 WHERE population > (SELECT population FROM bbc WHERE name='Russia')
   AND population > (SELECT population FROM bbc WHERE name='Denmark')

SELECT name FROM bbc
 WHERE population < (SELECT population FROM bbc WHERE name='Russia'
   AND population > (SELECT population FROM bbc WHERE name='Denmark')

次のコードの実行結果を選べ:

SELECT name FROM bbc
 WHERE population > ALL
       (SELECT MAX(population)
          FROM bbc
         WHERE region = 'Europe')
   AND region = 'South Asia'

Table-A

Afghanistan

Bhutan

Nepal

Sri Lanka

The Maldives

Table-B

Bangladesh

India

Pakistan

Table-C

China

India

Table-D

Brazil

Bangladesh

China

India

Table-E

France

Germany

Russia

Trukey