SQL exercises on soccer Database: Find the total number of players replaced in the extra time of play

SQL soccer Database: Basic Exercise-20 with Solution

20. From the following table, write a SQL query to count the total number of players replaced in the extra time of play.

Sample table: player_in_out

Sample Solution:

SELECT COUNT(*) 
FROM  player_in_out 
WHERE play_schedule='ET'
AND in_out='I';

Sample Output:

 count
-------
     9
(1 row)

Relational Algebra Expression:

Relational Algebra Tree:

Practice Online

Sample Database: soccer

Query Visualization:

Duration:

Rows:

Cost:

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Previous: From the following table, write a SQL query to count the total number of goalless draws have there in the entire tournament. Return number of goalless draws.
Next: 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.