SQL Exercises: Economics, Chemistry listed at end of 1970 as winners
From the following table, write a SQL query to find the details of 1970 Nobel Prize winners. Order the results by subject, ascending except for 'Chemistry' and ‘Economics’ which will come at the end of the result set. Return year, subject, winner, country, and category.
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 all columns from the 'nobel_win' table.
SELECT *
-- 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 the value 1970.
WHERE year = 1970
-- Orders the result set based on multiple criteria.
ORDER BY
-- The CASE statement assigns a priority (1 or 0) based on the 'subject' column.
CASE
WHEN subject IN ('Economics', 'Chemistry') THEN 1
ELSE 0
END ASC,
-- Orders the result set by 'subject' in ascending order.
subject,
-- Orders the result set by 'winner' in ascending order.
winner;
Output of the Query:
year subject winner country category 1970 Literature Aleksandr Solzhenitsyn Russia Linguist 1970 Physics Hannes Alfven Sweden Scientist 1970 Physics Louis Neel France Scientist 1970 Physiology Bernard Katz Germany Scientist 1970 Physiology Julius Axelrod USA Scientist 1970 Physiology Ulf von Euler Sweden Scientist 1970 Chemistry Luis Federico Leloir France Scientist 1970 Economics Paul Samuelson USA Economist
Code Explanation:
The given SQL query retrieves all columns from the 'nobel_win' table where the year is 1970. The query will return all rows that match this criteria. The output will be sorted based on the following order:
First, it will sort the rows where the subject is either 'Economics' or 'Chemistry' and put them in the first group and sort them by ascending order.
Next, it will sort the remaining rows by subject in ascending order.
Lastly, it will sort the remaining rows alphabetically based on the name of the winner in ascending order.
The ORDER BY clause uses a CASE statement to evaluate the subject column, if the subject is 'Economics' or 'Chemistry' it will return 1 and for all other subjects it will return 0. This will sort the rows with 'Economics' or 'Chemistry' as the subject in the first group and all other subjects in the second group.
In the end, the output will be a list of all Nobel Prizes awarded in 1970, with the rows where the subject or the winner's name is either 'Economics' or 'Chemistry' listed first, followed by all other rows sorted by their subject and name.
Practice Online
For more Practice: Solve these Related Problems:
- Write a SQL query to order 1971 winners by subject, placing "Peace" at the end.
- Write a SQL query to sort 1980 winners by subject, moving "Economics" to the bottom.
- Write a SQL query to arrange 1965 winners by subject, keeping "Chemistry" last.
- Write a SQL query to order 1990 winners by subject, placing "Literature" at the end.
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