SQL Exercise: Find the final four teams in the tournament

SQL soccer Database: Joins Exercise-30 with Solution

30. From the following tables, write a SQL query to find the final four teams in the tournament. Return country name.

Sample table: soccer_country

Sample table: match_details

Sample Solution:

SQL Code:

SELECT country_name
FROM match_details a
JOIN soccer_country b
ON a.team_id=b.country_id
WHERE play_stage='S';

Sample Output:

 country_name
--------------
 France
 Germany
 Portugal
 Wales
(4 rows)

Code Explanation:

The said query in SQL that retrieves the country names of teams that have played in the "Semi-Finals" of a soccer tournament.
The JOIN clause joins the 'match_details' table and the 'soccer_country' table using the "team_id" and the "country_id" columns from the respective tables.
The WHERE clause retrieves data for teams that have played in the "Semi-Finals" of a soccer tournament.

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Sample Database: soccer

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