SQL Exercise: Find the number of players booked for each team

SQL soccer Database: Joins Exercise-43 with Solution

43. From the following tables, write a SQL query to find out how many players each team has booked. Return country name, number of players booked.

Sample table: soccer_country

Sample table: player_booked

Sample Solution:

SQL Code:

SELECT a.country_name,COUNT(b.*) Booked 
FROM soccer_country a
JOIN player_booked b ON a.country_id=b.team_id
GROUP BY a.country_name
ORDER BY Booked DESC;

Sample Output:

    country_name     | booked
---------------------+--------
 Italy               |     16
 France              |     13
 Portugal            |     13
 Iceland             |     12
 Hungary             |     12
 Germany             |     11
 Wales               |     11
 Romania             |     10
 Poland              |     10
 Albania             |     10
 Belgium             |      9
 Slovakia            |      9
 Republic of Ireland |      9
 Croatia             |      8
 Austria             |      7
 Turkey              |      7
 Northern Ireland    |      6
 Ukraine             |      5
 Czech Republic      |      5
 Spain               |      5
 Switzerland         |      5
 England             |      3
 Sweden              |      3
 Russia              |      2
(24 rows)

Code Explanation:

The said query in SQL that selects the country name and counts the number of bookings for each country from the tables 'soccer_country' and 'player_booked'.
The JOIN clause joins the 'soccer_country' table aliased as "a" with the 'player_booked' table aliased as "b" using the country ID from "a" and the team ID from "b".
It then groups the results by country name and orders them in descending order based on the number of bookings so that the country with the most bookings appears first.

Practice Online

Sample Database: soccer

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