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

Last update on January 13 2026 12:20:27 (UTC/GMT +8 hours)

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

 match_no | play_stage | play_date  | results | decided_by | goal_score | venue_id | referee_id | audence | plr_of_match | stop1_sec | stop2_sec
----------+------------+------------+---------+------------+------------+----------+------------+---------+--------------+-----------+-----------
        1 | G          | 2016-06-11 | WIN     | N          | 2-1        |    20008 |      70007 |   75113 |       160154 |       131 |       242
        2 | G          | 2016-06-11 | WIN     | N          | 0-1        |    20002 |      70012 |   33805 |       160476 |        61 |       182
        3 | G          | 2016-06-11 | WIN     | N          | 2-1        |    20001 |      70017 |   37831 |       160540 |        64 |       268
        4 | G          | 2016-06-12 | DRAW    | N          | 1-1        |    20005 |      70011 |   62343 |       160128 |         0 |       185
        5 | G          | 2016-06-12 | WIN     | N          | 0-1        |    20007 |      70006 |   43842 |       160084 |       125 |       325
        6 | G          | 2016-06-12 | WIN     | N          | 1-0        |    20006 |      70014 |   33742 |       160291 |         2 |       246
        7 | G          | 2016-06-13 | WIN     | N          | 2-0        |    20003 |      70002 |   43035 |       160176 |        89 |       188
        8 | G          | 2016-06-13 | WIN     | N          | 1-0        |    20010 |      70009 |   29400 |       160429 |       360 |       182
        9 | G          | 2016-06-13 | DRAW    | N          | 1-1        |    20008 |      70010 |   73419 |       160335 |        67 |       194
.........
       51 | F          | 2016-07-11 | WIN     | N          | 1-0        |    20008 |      70005 |   75868 |       160307 |       161 |       181

View the table

Sample Solution:

-- This SQL query retrieves specific columns from the 'match_mast' table where the 'stop1_sec' column has the value 0.

SELECT match_no, play_date, goal_score 
-- Selects the specified columns ('match_no', 'play_date', 'goal_score') from the 'match_mast' table.
FROM  match_mast
-- 'match_mast' is the name of the table being queried.
WHERE stop1_sec=0;
-- The WHERE clause filters rows where the 'stop1_sec' column has the value 0.

Sample Output:

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

Code Explanation:

The said query in SQL that selects the columns match_no, play_date, and goal_score from the table match_mast where the value of stop1_sec column is equal to 0.
The WHERE clause filters the value of the stop1_sec column is equal to 0.

Relational Algebra Expression: