37 lines
1.5 KiB
SQL
37 lines
1.5 KiB
SQL
-- 1. List all players playing for a given team
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-- SELECT * FROM active_players JOIN players ON active_players.player_id = players.player_id WHERE team_name = "<insert team name here>" AND time = CURRENT_TIMESTAMP;
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SELECT player_name FROM players WHERE team_name = "man u";
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-- 2. List all players who have scored in a given game
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SELECT player_id FROM goals WHERE game_id = "<insert game ID here>";
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SELECT player_name FROM goals JOIN players ON goals.player_id = players.player_id WHERE game_id = 1;
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-- 3. List the top five goal scorers in the league
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SELECT player_id, COUNT(*) as goals_scored FROM goals GROUP BY player_id ORDER BY goals_scored DESC LIMIT 5;
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SELECT player_id, COUNT(*) as goals_scored FROM goals GROUP BY player_id ORDER BY goals_scored DESC LIMIT 5;
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SELECT
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player_name, COUNT(*) as goals_scored
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FROM
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goals INNER JOIN players ON goals.player_id = players.player_id
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GROUP BY players.player_id
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ORDER BY goals_scored DESC
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LIMIT 5;
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-- 4. List all teams and the amounts of points that they have so far
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-- drawback: adding up each time, costly if this is a common query
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SELECT
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teams.team_name,
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SUM(
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CASE
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WHEN results.winner = teams.team_name THEN 3
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WHEN results.winner IS NULL THEN 1
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ELSE 0
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END
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) AS total_points
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FROM
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teams
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LEFT JOIN games ON teams.team_name = games.home_team OR teams.team_name = games.away_team
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LEFT JOIN results ON games.game_id = results.game_id
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GROUP BY
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teams.team_name;
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