SQL Joins exercises on soccer Database: Find the referees who booked most number of players
SQL soccer Database: Joins Exercise-55 with Solution
55. From the following tables, write a SQL query to find those referees who booked most number of players. Return referee name, number of matches.
Sample table: player_booked
Sample table: match_mast
Sample table: referee_mast
Sample Solution:
SQL Code:
SELECT c.referee_name,
count(b.match_no)
FROM player_booked a
JOIN match_mast b ON a.match_no=b.match_no
JOIN referee_mast c ON b.referee_id=c.referee_id
GROUP BY referee_name
HAVING count(b.match_no)=
(SELECT max(mm)
FROM
(SELECT count(b.match_no) mm
FROM player_booked a
JOIN match_mast b ON a.match_no=b.match_no
JOIN referee_mast c ON b.referee_id=c.referee_id
GROUP BY referee_name) hh);
Sample Output:
referee_name | count ------------------+------- Mark Clattenburg | 21 (1 row)
Practice Online
Sample Database: soccer
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Previous: From the following tables, write a SQL query to find the referees and number of booked they made. Return referee name, number of matches.
Next: From the following tables, write a SQL query to find those players of each team who wore jersey number 10. Return country name, player name, position to play, age and playing club.
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SQL: Tips of the Day
SQL Server SELECT into existing table.
INSERT INTO dbo.TABLETWO SELECT col1, col2 FROM dbo.TABLEONE WHERE col3 LIKE @search_key
This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:
INSERT INTO dbo.TABLETWO (col1, col2) SELECT col1, col2 FROM dbo.TABLEONE WHERE col3 LIKE @search_key
Database: SQL Server
Ref: https://bit.ly/3y6tpA3
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