﻿ SQL: Find all details of the prize won by Johannes Georg Bednorz - w3resource

# SQL: Find all details of the prize won by Johannes Georg Bednorz

## SQL Basic Select Statement: Exercise-22 with Solution.

From the following table, write a SQL query to find the details of the Nobel Prize winner 'Johannes Georg Bednorz'. Return year, subject, winner, country, and category.

Sample table : nobel_win

Sample Solution :

``````SELECT *
FROM nobel_win
WHERE winner='Johannes Georg Bednorz';
``````

Output of the Query:

```year	subject	winner			country	  category
1987	Physics	Johannes Georg Bednorz	Germany	Scientist
```

Relational Algebra Expression:

Relational Algebra Tree:

## Query Visualization:

Duration:

Rows:

Cost:

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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