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https://github.com/kuhyx/WUT_Computer_Science.git
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Krzysztof kuhy Rudnicki
635e287095
git-subtree-dir: NotProgramming/EDABA-LAB git-subtree-mainline:b88865222bgit-subtree-split:cc8d63c734
45 lines
1.4 KiB
SQL
45 lines
1.4 KiB
SQL
-- aggregate functions and nested subqueries (print player with highest wage)
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SELECT id, skill, reputation, wages
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FROM Player
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WHERE wages = (select max(wages) from Player)
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-- logic operators (print Club with highest training ground quality and budget below 1000)
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SELECT id, reputation, country_of_origin, training_ground_quality, budget
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FROM Club
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WHERE (training_ground_quality = 5 AND budget < 1000)
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-- group by (print highest prize for a competitions taking part in each country)
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SELECT max(prize), country
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FROM Competition
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GROUP BY country
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-- having clause (print how many stadiums were build in each year)
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SELECT COUNT(id), build_year
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FROM Stadium
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GROUP BY build_year
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HAVING count(id) < 1000
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-- correlated, nested subqueries (print Players who earn more wage than the average wage in a given Club)
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SELECT id, wages, club_id
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FROM Player p
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WHERE wages >
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(SELECT AVG(wages)
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FROM Player
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WHERE club_id =
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p.club_id)
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ORDER BY wages
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-- join (print how much manager earns in each club)
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SELECT Club.id AS Club_id, Manager.id AS Manager_id, Club.reputation AS Club_reputation, Manager.wage AS Manager_wage
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FROM Club
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INNER JOIN Manager ON Club.Manager_id = Manager.id
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-- right join (print all Club id's and their Players or null if a Club does not have a single Player)
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SELECT Player.id AS Player_id, Club.id AS Club_id
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FROM Player
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RIGHT JOIN Club ON Player.Club_id = Club.id
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ORDER BY Player.id
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