SQL Exercise: Number of matches played at each venue and their city
SQL soccer Database: Joins Exercise-14 with Solution
14. From the following tables, write a SQL query to count the number of matches played at each venue. Sort the result-set on venue name. Return Venue name, city, and number of matches.
Sample table: soccer_venue
Sample table: soccer_city
Sample table: match_mast
SELECT a.venue_name, b.city, count(c.match_no) FROM soccer_venue a JOIN soccer_city b ON a.city_id=b.city_id JOIN match_mast c ON a.venue_id=c.venue_id GROUP BY venue_name,city ORDER BY venue_name;
venue_name | city | count -------------------------+---------------+------- Parc des Princes | Paris | 5 Stade Bollaert-Delelis | Lens | 4 Stade de Bordeaux | Bordeaux | 5 Stade de France | Saint-Denis | 7 Stade de Lyon | Lyon | 6 Stade de Nice | Nice | 4 Stade Geoffroy Guichard | Saint-Etienne | 4 Stade Pierre Mauroy | Lille | 6 Stade VElodrome | Marseille | 6 Stadium de Toulouse | Toulouse | 4 (10 rows)
The said query in SQL that selects the venue name, city, and count of matches played in each venue and city combination, by joining tables soccer_venue, soccer_city, and match_mast on the venue_id and city_id fields.
The result is grouped by venue_name and city, and ordered by venue_name in ascending order.
Relational Algebra Expression:
Relational Algebra Tree:
Sample Database: soccer
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Previous SQL Exercise: Stadium hosted the final match of EURO cup 2016.
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