SQL Exercises: Names of Physics winners since 1950

SQL Basic Select Statement: Exercise-15 with Solution.

From the following table, write a SQL query to find the Nobel Prize winners in the field of ‘Physics’ since 1950. Return winner.

Sample table: nobel_win

YEAR SUBJECT                   WINNER                                        COUNTRY                CATEGORY
---- ------------------------- --------------------------------------------- ------------------------- ------------
1970 Physics                   Hannes Alfven                                 Sweden                 Scientist
1970 Physics                   Louis Neel                                    France                 Scientist
1970 Chemistry                 Luis Federico Leloir                          France                 Scientist
1970 Physiology                Ulf von Euler                                 Sweden                 Scientist
1970 Physiology                Bernard Katz                                  Germany                Scientist
1970 Literature                Aleksandr Solzhenitsyn                        Russia                 Linguist
1970 Economics                 Paul Samuelson                                USA                    Economist
1970 Physiology                Julius Axelrod                                USA                    Scientist
1971 Physics                   Dennis Gabor                                  Hungary                Scientist
1971 Chemistry                 Gerhard Herzberg                              Germany                Scientist
1971 Peace                     Willy Brandt                                  Germany                Chancellor
1971 Literature                Pablo Neruda                                  Chile                  Linguist
1971 Economics                 Simon Kuznets                                 Russia                 Economist
1978 Peace                     Anwar al-Sadat                                Egypt                  President
1978 Peace                     Menachem Begin                                Israel                 Prime Minister
1987 Chemistry                 Donald J. Cram                                USA                    Scientist
1987 Chemistry                 Jean-Marie Lehn                               France                 Scientist
1987 Physiology                Susumu Tonegawa                               Japan                  Scientist
1994 Economics                 Reinhard Selten                               Germany                Economist
1994 Peace                     Yitzhak Rabin                                 Israel                 Prime Minister
1987 Physics                   Johannes Georg Bednorz                        Germany                Scientist
1987 Literature                Joseph Brodsky                                Russia                 Linguist
1987 Economics                 Robert Solow                                  USA                    Economist
1994 Literature                Kenzaburo Oe                                  Japan                  Linguist

Sample Solution :

-- This query selects the 'winner' column from the 'nobel_win' table.
SELECT winner
-- Specifies the table from which to retrieve the data (in this case, 'nobel_win').
FROM nobel_win
-- Filters the rows to only include those where the 'year' column has a value greater than or equal to 1950
-- and the 'subject' column has the value 'Physics'.
WHERE year >= 1950
  AND subject = 'Physics';

Output of the Query:

winner
Hannes Alfven
Louis Neel
Dennis Gabor
Johannes Georg Bednorz

Code Explaination:

The said SQL query retrieves the winner column from the nobel_win table, where the year of the award is greater than or equal to 1950 and the subject is "Physics". It will return all the rows that match these criteria, resulting in a list of winners of the Nobel Prize in Physics after 1950.

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Query Visualization:

Duration:

Rows:

Cost:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous SQL Exercise: Display the year and subject of Dennis Gabor prize.
Next SQL Exercise: Details of Chemistry prize winners from 1965 to 1975.