SQL Exercise: Find the number of penalty shots taken by the teams

SQL soccer Database: Exercise-26 with Solution

26. From the following table, write a SQL query to count the number of penalty shots taken by each team. Return country name, number of shots as "Number of Shots".

 country_id | country_abbr |    country_name
------------+--------------+---------------------
       1201 | ALB          | Albania
       1202 | AUT          | Austria
       1203 | BEL          | Belgium
       1204 | CRO          | Croatia
       1205 | CZE          | Czech Republic
       1206 | ENG          | England
       1207 | FRA          | France
       1208 | GER          | Germany
       1209 | HUN          | Hungary
       1210 | ISL          | Iceland
       1211 | ITA          | Italy
       1212 | NIR          | Northern Ireland
       1213 | POL          | Poland
       1214 | POR          | Portugal
       1215 | IRL          | Republic of Ireland
       1216 | ROU          | Romania
       1217 | RUS          | Russia
       1218 | SVK          | Slovakia
       1219 | ESP          | Spain
       1220 | SWE          | Sweden
       1221 | SUI          | Switzerland
       1222 | TUR          | Turkey
       1223 | UKR          | Ukraine
       1224 | WAL          | Wales
       1225 | SLO          | Slovenia
       1226 | NED          | Netherlands
       1227 | SRB          | Serbia
       1228 | SCO          | Scotland
       1229 | NOR          | Norway

 kick_id | match_no | team_id | player_id | score_goal | kick_no
---------+----------+---------+-----------+------------+---------
       1 |       37 |    1221 |    160467 | Y          |       1
       2 |       37 |    1213 |    160297 | Y          |       2
       3 |       37 |    1221 |    160477 | N          |       3
       4 |       37 |    1213 |    160298 | Y          |       4
       5 |       37 |    1221 |    160476 | Y          |       5
       6 |       37 |    1213 |    160281 | Y          |       6
       7 |       37 |    1221 |    160470 | Y          |       7
       8 |       37 |    1213 |    160287 | Y          |       8
       9 |       37 |    1221 |    160469 | Y          |       9
      10 |       37 |    1213 |    160291 | Y          |      10
      11 |       45 |    1214 |    160322 | Y          |       1
      12 |       45 |    1213 |    160297 | Y          |       2
      13 |       45 |    1214 |    160316 | Y          |       3
      14 |       45 |    1213 |    160298 | Y          |       4
      15 |       45 |    1214 |    160314 | Y          |       5
      16 |       45 |    1213 |    160281 | Y          |       6
      17 |       45 |    1214 |    160320 | Y          |       7
      18 |       45 |    1213 |    160287 | N          |       8
      19 |       45 |    1214 |    160321 | Y          |       9
      20 |       47 |    1211 |    160251 | Y          |       1
      21 |       47 |    1208 |    160176 | Y          |       2
      22 |       47 |    1211 |    160253 | N          |       3
      23 |       47 |    1208 |    160183 | N          |       4
      24 |       47 |    1211 |    160234 | Y          |       5
      25 |       47 |    1208 |    160177 | N          |       6
      26 |       47 |    1211 |    160252 | N          |       7
      27 |       47 |    1208 |    160173 | Y          |       8
      28 |       47 |    1211 |    160235 | N          |       9
      29 |       47 |    1208 |    160180 | N          |      10
      30 |       47 |    1211 |    160244 | Y          |      11
      31 |       47 |    1208 |    160168 | Y          |      12
      32 |       47 |    1211 |    160246 | Y          |      13
      33 |       47 |    1208 |    160169 | Y          |      14
      34 |       47 |    1211 |    160238 | Y          |      15
      35 |       47 |    1208 |    160165 | Y          |      16
      36 |       47 |    1211 |    160237 | N          |      17
      37 |       47 |    1208 |    160166 | Y          |      18

Sample Solution:

SQL Code:

-- This SQL query calculates the count of penalty shots for each country participating in soccer_country.

SELECT a.country_name, COUNT(b.*) as "Number of Shots"
-- Selects the country name and the count of penalty shots for each group, aliasing the count as "Number of Shots".
FROM soccer_country a, penalty_shootout b
-- Specifies the tables involved in the query, using aliases 'a' for 'soccer_country' and 'b' for 'penalty_shootout'.
WHERE b.team_id = a.country_id
-- Connects rows in 'penalty_shootout' where 'team_id' matches 'country_id' in 'soccer_country'.
GROUP BY a.country_name;
-- Groups the results by the 'country_name' column from 'soccer_country'.

Sample Output:

 country_name | Number of Shots
--------------+-----------------
 Poland       |               9
 Italy        |               9
 Germany      |               9
 Portugal     |               5
 Switzerland  |               5
(5 rows)

Code Explanation:

The said query in SQL that retrieves the number of penalty shootout shots taken by each country.
This query counts the number of rows from the penalty_shootout table and the "Number of Shots" is used as a alias to the count result.
The join condition between the two tables, linking the team_id column from penalty_shootout with the country_id column from soccer_country.
The GROUP BY clause groups the results by country_name, so that the count is calculated for each unique country in the soccer_country table.

Practice Online

Sample Database: soccer

Query Visualization:

Duration:

Rows:

Cost:

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