SQLZOO——SELECT from Nobel Tutorial

nobel Nobel Laureates

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We continue practicing simple SQL queries on a single table.

This tutorial is concerned with a table of Nobel prize winners:

nobel(yr, subject, winner)

Using the SELECT statement.

Winners from 1950

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1.

Change the query shown so that it displays Nobel prizes for 1950.

SELECT *
FROM nobel
where yr = 1950

 

1962 Literature

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2.

Show who won the 1962 prize for literature.

SELECT winner
FROM nobel
WHERE yr = 1962 AND subject = 'literature'

 

Albert Einstein

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3.

Show the year and subject that won 'Albert Einstein' his prize.

select yr,subject
from nobel
where winner = 'Albert Einstein'

Recent Peace Prizes

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4.

Give the name of the 'peace' winners since the year 2000, including 2000.

select winner
from nobel
where subject = 'peace' and yr >= 2000

  

Literature in the 1980's

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5.

Show all details (yr, subject, winner) of the literature prize winners for 1980 to 1989 inclusive.

select *
from nobel
where subject = 'literature' and yr between 1980 and 1989

 

Only Presidents

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6.

Show all details of the presidential winners:

• Theodore Roosevelt
• Thomas Woodrow Wilson
• Jimmy Carter
• Barack Obama

SELECT *
FROM nobel
WHERE winner IN ('Theodore Roosevelt',
                  'Woodrow Wilson',
                  'Jimmy Carter',
                  'Barack Obama')

John

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7.

Show the winners with first name John

select winner
from nobel
where winner like 'John%'

  

Chemistry and Physics from different years

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8.

Show the year, subject, and name of physics winners for 1980 together with the chemistry winners for 1984.

select *
from nobel
where (subject = 'physics' and yr = 1980)
   or (subject = 'chemistry' and yr = 1984)

 

Exclude Chemists and Medics

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9.

Show the year, subject, and name of winners for 1980 excluding chemistry and medicine

select *
from nobel
where yr = 1980 and subject not in ('chemistry','medicine')

 

Early Medicine, Late Literature

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10.

Show year, subject, and name of people who won a 'Medicine' prize in an early year (before 1910, not including 1910) together with winners of a 'Literature' prize in a later year (after 2004, including 2004)

select *
from nobel
where (subject = 'Medicine' and yr < 1910)
   or (subject = 'Literature' and yr >= 2004)

 

Umlaut

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11.

Find all details of the prize won by PETER GRÜNBERG

Non-ASCII characters

select *
from nobel
where winner = 'PETER GRÜNBERG'

 

Apostrophe

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12.

Find all details of the prize won by EUGENE O'NEILL

Escaping single quotes

select *
from nobel
where winner like 'EUGENE O\'NEILL'

SQL语句的转义字符可以用 \ 或 '

select *
from nobel
where winner like 'EUGENE O''NEILL'

 

Knights of the realmt

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13.

Knights in order

List the winners, year and subject where the winner starts with Sir. Show the the most recent first, then by name order.

select winner, yr, subject
from nobel
where winner like 'Sir%'
order by yr desc, winner

 

Chemistry and Physics last

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14.

The expression subject IN ('chemistry','physics') can be used as a value - it will be 0 or 1.

Show the 1984 winners and subject ordered by subject and winner name; but list chemistry and physics last.

SELECT winner, subject
FROM nobel
WHERE yr = 1984
ORDER BY
CASE WHEN subject IN ('Physics','Chemistry') THEN 1
     ELSE 0
     END
ASC,subject,winner

 CASE函数用法：

1）CASE expr WHEN vl THEN rl

                        [WHEN v2 THEN r2]

                        [ELSE rn]

      END

        该函数表示，如果 expr值等于某个vn，则返回对应位置 THEN后面的结果。如果与所有值都不相等，则返回 ELSE 后面的m。

2）CASE WHEN v1 THEN r1

                [WHEN v2 THEN r2]

                ELSE m]

      END

该函数表示，某个 vn 值为TRUE 时，返回对应位置THEN后面的结果，如果所有值都不

为TRUE，则返回 ELSE 后的m。