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[英]Order by max value on distinct records, without using a subquery (mysql)
[英]MySQL subquery does not give me the highest value with MAX or ORDER BY LIMIT 1
我的MySQL查詢有問題。 它的子查詢沒有提供last.id
。
SELECT rounds.winners, rounds.losers
FROM players
INNER JOIN teams ON teams.id = players.ilmo_id
INNER JOIN status AS first ON first.id = players.status_id
LEFT JOIN matches ON matches.chart_id = 12
AND matches.id = (
SELECT last.id
FROM matches AS last
WHERE (last.player1_id = players.id
OR last.player2_id = players.id
OR last.player3_id = players.id
OR last.player4_id = players.id)
ORDER BY last.id DESC
LIMIT 1
)
JOIN charts ON charts.id = matches.chart_id
JOIN places ON charts.template_id = places.template_id AND places.id = matches.place_id
JOIN templates ON places.template_id = templates.id
JOIN rounds ON places.round_id = rounds.id
WHERE players.comp_id = 12
我也嘗試過這種方式,但這不起作用:
SELECT rounds.winners, rounds.losers
FROM players
INNER JOIN teams ON teams.id = players.ilmo_id
INNER JOIN status AS first ON first.id = players.status_id
LEFT JOIN matches ON matches.chart_id = 12
AND matches.id = (
SELECT MAX(last.id)
FROM matches AS last
WHERE (last.player1_id = players.id
OR last.player2_id = players.id
OR last.player3_id = players.id
OR last.player4_id = players.id)
)
JOIN charts ON charts.id = matches.chart_id
JOIN places ON charts.template_id = places.template_id AND places.id = matches.place_id
JOIN templates ON places.template_id = templates.id
JOIN rounds ON places.round_id = rounds.id
WHERE players.comp_id = 12
編輯:
這是最新版本,看來可以正常運行。
SELECT rounds.winners, rounds.losers
FROM players
INNER JOIN teams ON teams.id = players.ilmo_id
INNER JOIN status AS first ON first.id = players.status_id
LEFT JOIN matches ON matches.chart_id = 12
AND matches.id = (
SELECT last.id
FROM matches AS last
WHERE last.chart_id = 12 /* modified */
AND (last.player1_id = players.id
OR last.player2_id = players.id
OR last.player3_id = players.id
OR last.player4_id = players.id)
ORDER BY last.place_id DESC /* modified */
LIMIT 1
)
JOIN charts ON charts.id = matches.chart_id
JOIN places ON charts.template_id = places.template_id AND places.id = matches.place_id
JOIN templates ON places.template_id = templates.id
JOIN rounds ON places.round_id = rounds.id
WHERE players.comp_id = 12
SELECT rounds.winners, rounds.losers
FROM players
INNER JOIN teams ON teams.id = players.ilmo_id
INNER JOIN status AS first ON first.id = players.status_id
LEFT JOIN matches ON matches.id = (
SELECT max(last.id)
FROM matches AS last
WHERE last.chart_id = 12 /* modified */
AND (last.player1_id = players.id
OR last.player2_id = players.id
OR last.player3_id = players.id
OR last.player4_id = players.id)
)
JOIN charts ON charts.id = matches.chart_id
JOIN places ON charts.template_id = places.template_id AND places.id = matches.place_id
JOIN templates ON places.template_id = templates.id
JOIN rounds ON places.round_id = rounds.id
WHERE players.comp_id = 12
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