SQL exercises on soccer Database: Compute a list to show the number of substitute happened in various stage of play for the entire tournament

SQL soccer Database: Basic Exercise-21 with Solution

21. From the following table, write a SQL query to count the number of substitute happened in various stage of play for the entire Tournament. Sort the result-set in ascending order by play-half, play-schedule and number of substitute happened. Return play-half, play-schedule, number of substitute happened.

Sample table: player_in_out

Sample Solution:

SELECT play_half,play_schedule,COUNT(*) 
FROM player_in_out 
WHERE in_out='I'
GROUP BY play_half,play_schedule
ORDER BY play_half,play_schedule,count(*) DESC;

Sample Output:

 play_half | play_schedule | count
-----------+---------------+-------
         1 | ET            |     4
         1 | NT            |     3
         2 | ET            |     5
         2 | NT            |   272
         2 | ST            |     9
(5 rows)

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Sample Database: soccer

Query Visualization:

Duration:

Rows:

Cost:

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