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SQL: Filter the names of the Physics award 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

 

Sample Solution :

SELECT winner 
FROM nobel_win
WHERE year>=1950
AND subject='Physics';

Output of the Query:

winner
Hannes Alfven
Louis Neel
Dennis Gabor
Johannes Georg Bednorz

Relational Algebra Expression:

Relational Algebra Expression: Filter the name of the 'Physics' winners since the year 1950.

Relational Algebra Tree:

Relational Algebra Tree: Filter the name of the 'Physics' winners since the year 1950.

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Query Visualization:

Duration:

Query visualization of Filter the name of the 'Physics' winners since the year 1950 - Duration

Rows:

Query visualization of Filter the name of the 'Physics' winners since the year 1950 - Rows

Cost:

Query visualization of Filter the name of the 'Physics' winners since the year 1950 - Cost

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Previous: From the following table, write a SQL query to find the Nobel Prize winner 'Dennis Gabor'. Return year, subject.
Next: From the following table, write a SQL query to find the Nobel Prize winners in ‘Chemistry’ between the years 1965 to 1975. Begin and end values are included. Return year, subject, winner, and country

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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