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SQL Exercise: Matches, first half with no stoppage time added

SQL soccer Database: Basic Exercise-12 with Solution

12. From the following table, write a SQL query to find the matches in which no stoppage time was added during the first half of play. Return match no, date of play, and goal scored.

Sample table: match_mast


Sample Solution:

SELECT match_no, play_date, goal_score 
FROM  match_mast
WHERE stop1_sec=0;

Sample Output:

 match_no | play_date  | goal_score
----------+------------+------------
        4 | 2016-06-12 | 1-1
(1 row)

Relational Algebra Expression:

Relational Algebra Expression: Find the match no, date of play, and goal scored for that match in which no stoppage time have been added in 1st half of play.

Relational Algebra Tree:

Relational Algebra Tree: Find the match no, date of play, and goal scored for that match in which no stoppage time have been added in 1st half of play.

Practice Online



Sample Database: soccer

soccer database relationship structure

Query Visualization:

Duration:

Query visualization of Find the match no, date of play, and goal scored for that match in which no stoppage time have been added in 1st half of play - Duration

Rows:

Query visualization of Find the match no, date of play, and goal scored for that match in which no stoppage time have been added in 1st half of play - Rows

Cost:

Query visualization of Find the match no, date of play, and goal scored for that match in which no stoppage time have been added in 1st half of play - Cost

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Previous SQL Exercise: Number of goals scored during a normal play schedule.
Next SQL Exercise: Matches, goalless draws in group stage matches.

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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