SQL: Display the winners in Physics for 1970 together with the winner of Economics for 1971

SQL Basic Select Statement: Exercise-19 with Solution.

From the following table, write a SQL query that combines the winners in Physics, 1970 and in Economics, 1971. Return year, subject, winner, country, and category.

Sample table: nobel_win

Sample Solution:

SELECT * FROM nobel_win  WHERE (subject ='Physics' AND year=1970) UNION (SELECT * FROM nobel_win  WHERE (subject ='Economics' AND year=1971));

Output of the Query:

year	subject		winner		country	  category
1970	Physics		Hannes Alfven	Sweden	 Scientist
1970	Physics		Louis Neel	France	 Scientist
1971	Economics	Simon Kuznets	Russia	 Economist

Relational Algebra Expression:

Relational Algebra Tree:

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Query Visualization:

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