子查詢測驗
bbc
name國家名 |
region區域 |
area面積 |
population人口 |
gdp國民生產總值 |
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 |
... |
選擇代碼以顯示在每個區域人口最小的國家的國家名稱,區域和人口。
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)
選擇代碼以顯示國家名稱,該國所在的地區每國人口都超過50000。
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)
選擇代碼以顯示國家名稱,該國家人口少於它周圍的全部國家的人口三分之一。
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)
選擇你會從這個代碼獲得的結果。
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-AAndorra |
Albania |
Austria |
Bulgaria |
Table-BFrance | Europe |
Germany | Europe |
Russia | Europe |
Turkey | Europe |
Table-CFrance |
Germany |
Andorra |
Albania |
Table-DFrance |
Germany |
Russia |
Turkey |
Table-EFrance |
Germany |
Russia |
Turkey |
Brazil |
United States of USA |
Canada |
選擇代碼以顯示國家名稱,該國有比非洲任何國家更大的國內生產總值GDP。
SELECT name FROM bbc
WHERE gdp > ALL (SELECT MAX(gdp) FROM bbc WHERE region = 'Africa' AND gdp=0)
SELECT name FROM bbc
WHERE gdp > ALL (SELECT MAX(gdp) FROM bbc WHERE region = 'Africa' AND gdp IS NOT NULL)
SELECT name FROM bbc
WHERE gdp > ALL (SELECT MIN(gdp) FROM bbc WHERE region = 'Africa' AND gdp IS NOT NULL)
SELECT name FROM bbc
WHERE gdp > ALL (SELECT MAX(gdp) FROM bbc WHERE region = 'Africa' AND population IS NOT NULL)
SELECT name FROM bbc
WHERE gdp > ALL (SELECT MAX(gdp) FROM bbc WHERE region = 'Europe' AND gdp IS NOT NULL)
選擇代碼以顯示國家名稱,該國人口比俄羅斯少,但比丹麥的多。
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')
>選擇你會從這個代碼獲得的結果。
SELECT name FROM bbc
WHERE population > ALL
(SELECT MAX(population)
FROM bbc
WHERE region = 'Europe')
AND region = 'South Asia'
Table-AAfghanistan |
Bhutan |
Nepal |
Sri Lanka |
The Maldives |
Table-BBangladesh |
India |
Pakistan |
Table-DBrazil |
Bangladesh |
China |
India |
Table-EFrance |
Germany |
Russia |
Trukey |
DataWars: Practice Data Science/Analysis with +100 Real Life Projects Your server today is: Dipsy