w3resource
Run SQL Query

SQL Exercise: Within each half of play, find the number of bookings

SQL soccer Database: Exercise-27 with Solution

27. From the following table, write a SQL query to count the number of bookings in each half of play within the normal play schedule. Return play_half, play_schedule, number of booking happened.

Sample table: player_booked


Sample Solution:

SQL Code:

SELECT play_half,play_schedule,COUNT(*) 
FROM player_booked
WHERE play_schedule='NT'
GROUP BY play_half,play_schedule;

Sample Output:

 play_half | play_schedule | count
-----------+---------------+-------
         1 | NT            |    61
         2 | NT            |   123
(2 rows)

Relational Algebra Expression:

Relational Algebra Expression: Find the number of booking happened in each half of play within normal play schedule.

Relational Algebra Tree:

Relational Algebra Tree: Find the number of booking happened in each half of play within normal play schedule.

Practice Online


Sample Database: soccer

soccer database relationship structure

Query Visualization:

Duration:

Query visualization of Find the number of booking happened in each half of play within normal play schedule - Duration

Rows:

Query visualization of Find the number of booking happened in each half of play within normal play schedule - Rows

Cost:

Query visualization of Find the number of booking happened in each half of play within normal play schedule - Cost

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous SQL Exercise: Find the number of penalty shots taken by the teams.
Next SQL Exercise: Find the number of booking happened in stoppage time.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

SQL: Tips of the Day

Can a foreign key be NULL and/or duplicate?

First remember a Foreign key simply requires that the value in that field must exist first in a different table (the parent table). That is all an Foreign key is by definition. Null by definition is not a value. Null means that we do not yet know what the value is.

Ref: https://bit.ly/3uVu3OS