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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 Expression: Show all the details of the winners with first name Louis.

Relational Algebra Tree:

Relational Algebra Tree: Show all the details of the winners with first name Louis.

Practice Online


Query Visualization:

Duration:

Query visualization of Show all the winners in Physics for 1970 together with the winner of Economics for 1971 - Duration

Rows:

Query visualization of Show all the winners in Physics for 1970 together with the winner of Economics for 1971 - Rows

Cost:

Query visualization of Show all the winners in Physics for 1970 together with the winner of Economics for 1971 - Cost

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Previous: From the following table, write a SQL query to find the details of the winners whose first name matches with the string 'Louis'. Return year, subject, winner, country, and category.
Next: From the following table, write a SQL query to find the Nobel Prize winners in 1970 excluding the subjects Physiology and Economics. Return year, subject, winner, country, and category.

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SQL: Tips of the Day

Can a foreign key be NULL and/or duplicate?

First remember a Foreign key simply requires that the value in that field must exist first in a different table (the parent table). That is all an Foreign key is by definition. Null by definition is not a value. Null means that we do not yet know what the value is.

Ref: https://bit.ly/3uVu3OS