3 Nobel Quiz-SQLZoo

最新推荐文章于 2025-02-08 22:34:58 发布

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最新推荐文章于 2025-02-08 22:34:58 发布

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本文精选了多个SQL查询案例，涵盖从查找特定模式的获奖者到分析奖项分布的复杂查询。通过实际例子，读者可以深入了解如何使用SQL进行高效的数据筛选与统计。

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1. Pick the code which shows the name of winner’s names beginning with C and ending in n

SELECT winner FROM nobel
 WHERE winner LIKE 'C%' AND winner LIKE '%n'

2. Select the code that shows how many Chemistry awards were given between 1950 and 1960

SELECT COUNT(subject) FROM nobel
 WHERE subject = 'Chemistry'
   AND yr BETWEEN 1950 and 1960

3. Pick the code that shows the amount of years where no Medicine awards were given

SELECT COUNT(DISTINCT yr) FROM nobel
 WHERE yr NOT IN (SELECT DISTINCT yr FROM nobel WHERE subject = 'Medicine')

4. Select the result that would be obtained from the following code:

SELECT subject, winner FROM nobel WHERE winner LIKE 'Sir%' AND yr LIKE '196%'

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5. Select the code which would show the year when neither a Physics or Chemistry award was given

SELECT yr FROM nobel
 WHERE yr NOT IN(SELECT yr 
                   FROM nobel
                 WHERE subject IN ('Chemistry','Physics'))

6. Select the code which shows the years when a Medicine award was given but no Peace or Literature award was

SELECT DISTINCT yr
  FROM nobel
 WHERE subject='Medicine' 
   AND yr NOT IN(SELECT yr FROM nobel 
                  WHERE subject='Literature')
   AND yr NOT IN (SELECT yr FROM nobel
                   WHERE subject='Peace')

7. Pick the result that would be obtained from the following code:

 SELECT subject, COUNT(subject) 
   FROM nobel 
  WHERE yr ='1960' 
  GROUP BY subject

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