Mysql 左连接中的多行导致重复数据
我有一个相当复杂的MySQL查询，用于从下表检索球队及其联赛表现： 团队 分区/季/队 团队点调整 火柴 问题是：Mysql 左连接中的多行导致重复数据,mysql,sql,Mysql,Sql,我有一个相当复杂的MySQL查询，用于从下表检索球队及其联赛表现： 团队 分区/季/队 团队点调整 火柴 问题是： "SELECT t.name AS team_name, t.id as team_id, SUM(win) AS win, SUM(draw) AS draw, SUM(loss) AS loss, SUM(goals_for) AS goals_for, SUM(g
"SELECT
t.name AS team_name,
t.id as team_id,
SUM(win) AS win,
SUM(draw) AS draw,
SUM(loss) AS loss,
SUM(goals_for) AS goals_for,
SUM(goals_against) AS goals_against,
SUM(goal_difference) as goal_difference,
SUM(games_played) AS games_played,
SUM(points) + IFNULL(tpa.point_adjustment, 0) as points
FROM teams t
LEFT JOIN team_point_adjustments tpa
ON t.id = tpa.team_id
AND (tpa.season_id = 1 OR tpa.season_id IS NULL)
INNER JOIN
division_season_team dst
ON t.id = dst.team_id
LEFT JOIN (
SELECT home_id
team_name,
IF(home_SCORE > away_score, 1,0) win,
IF(home_score = away_score, 1,0) draw,
IF(home_score < away_score, 1,0) loss,
home_score goals_for,
away_score goals_against,
home_score - away_score goal_difference,
1 games_played,
CASE WHEN home_score > away_score THEN 5 WHEN home_score = away_score THEN 2 ELSE 0 END points
FROM matches mat WHERE played = 1 AND season_id = 1 AND division_id = 1
UNION ALL
SELECT away_id,
IF(home_score < away_score, 1, 0),
IF(home_score = away_score, 1,0),
IF(home_score > away_score, 1,0),
away_score,
home_score,
away_score - home_score goal_difference,
1 games_played,
CASE WHEN home_score < away_score THEN 5 WHEN home_score = away_score THEN 2 ELSE 0 END
FROM matches
WHERE played = 1 AND season_id = 1 AND division_id = 1
) AS total ON total.team_name=t.id WHERE dst.season_id = 1 AND dst.division_id = 1
GROUP BY t.id
ORDER BY points DESC, goal_difference DESC"
已尝试为此子查询添加group by子句，但出现语法错误。如果此左联接中只有一个匹配行，则数据都是正确的。如果重复行上的数据完全相同，则DISTINCT在这里会有所帮助 选择不同的 t、 以团队名称命名， t、 id作为团队id， SUMwin作为win， 素描即画， 把损失当作损失， 将目标作为目标， ... etc在加入前，将表上的比赛和表上的赛区队进行汇总，这两个赛区都必须离开，以防万一：
SELECT
t.name AS team_name,
t.id as team_id,
total.win,
total.draw,
total.loss,
total.goals_for,
total.goals_against,
total.goal_difference,
total.games_played,
total.points + IFNULL(tpa.point_adjustment, 0) as points
FROM teams t
LEFT JOIN (
SELECT team_id, season_id, SUM(point_adjustment) AS point_adjustment
FROM team_point_adjustments
GROUP BY team_id, season_id
) tpa
ON t.id = tpa.team_id AND (tpa.season_id = '" . $season_id . "' OR tpa.season_id IS NULL)
LEFT JOIN division_season_team dst ON t.id = dst.team_id
LEFT JOIN (
SELECT
g.team_id,
g.team_name,
SUM(g.win) AS win,
SUM(g.draw) AS draw,
SUM(g.loss) AS loss,
SUM(g.goals_for) AS goals_for,
SUM(g.goals_against) AS goals_against,
SUM(g.goal_difference) as goal_difference,
SUM(g.g.games_played) AS games_played,
SUM(points) AS points
FROM (
SELECT home_id
team_name,
IF(home_SCORE > away_score, 1,0) win,
IF(home_score = away_score, 1,0) draw,
IF(home_score < away_score, 1,0) loss,
home_score goals_for,
away_score goals_against,
home_score - away_score goal_difference,
1 games_played,
CASE WHEN home_score > away_score THEN '" . $win_value . "' WHEN home_score = away_score THEN '" . $draw_value . "' ELSE '" . $loss_value . "' END points
FROM matches mat WHERE played = 1 AND season_id = '" . $season_id . "' AND division_id = '" . $division_id . "'
UNION ALL
SELECT away_id,
IF(home_score < away_score, 1, 0),
IF(home_score = away_score, 1,0),
IF(home_score > away_score, 1,0),
away_score,
home_score,
away_score - home_score goal_difference,
1 games_played,
CASE WHEN home_score < away_score THEN '" . $win_value . "' WHEN home_score = away_score THEN '" . $draw_value . "' ELSE '" . $loss_value . "' END
FROM matches
WHERE played = 1 AND season_id = '" . $season_id . "' AND division_id = '" . $division_id . "'
) g
GROUP BY g.team_id, f.team_name
) AS total ON total.team_id=t.id
WHERE dst.season_id = '" . $season_id . "' AND dst.division_id = '" . $division_id . "'
ORDER BY points DESC, goal_difference DESC
我希望我没有输入错误…如果您查看表格结构，每次添加日期、添加或扣除的点数，团队点数调整中的数据都会有所不同，这也是扣除的原因之一。您可能永远不需要在包含聚合函数SSUMTPA的查询中使用不同的修饰符。点数调整？还有，我认为将PHP变量合并到这个问题中会增加不必要的混乱。在任何情况下，这些都应该是适当准备和绑定查询的占位符。但是point\u adjustment不在division\u season\u team表中，因此我得到一个列not found error
+------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| point_adjustment | int(11) | NO | | 0 | |
| reason | varchar(191) | NO | | NULL | |
| reason_date | date | NO | | NULL | |
| team_id | int(10) unsigned | YES | MUL | NULL | |
| season_id | int(10) unsigned | YES | MUL | NULL | |
| created_at | timestamp | YES | | NULL | |
| updated_at | timestamp | YES | | NULL | |
+------------------+------------------+------+-----+---------+----------------+
+-------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| home_score | int(11) | NO | | 0 | |
| away_score | int(11) | NO | | 0 | |
| division_id | int(10) unsigned | YES | MUL | NULL | |
| season_id | int(10) unsigned | YES | MUL | NULL | |
| home_id | int(10) unsigned | YES | MUL | NULL | |
| away_id | int(10) unsigned | YES | MUL | NULL | |
| match_date | datetime | NO | | NULL | |
| court | int(10) unsigned | NO | | NULL | |
| round | int(10) unsigned | NO | | NULL | |
| played | tinyint(1) | NO | | 0 | |
| walkover | tinyint(1) | NO | | 0 | |
| home_adjust | int(11) | NO | | 0 | |
| away_adjust | int(11) | NO | | 0 | |
| created_at | timestamp | YES | | NULL | |
| updated_at | timestamp | YES | | NULL | |
| deleted_at | timestamp | YES | | NULL | |
+-------------+------------------+------+-----+---------+----------------+
"SELECT
t.name AS team_name,
t.id as team_id,
SUM(win) AS win,
SUM(draw) AS draw,
SUM(loss) AS loss,
SUM(goals_for) AS goals_for,
SUM(goals_against) AS goals_against,
SUM(goal_difference) as goal_difference,
SUM(games_played) AS games_played,
SUM(points) + IFNULL(tpa.point_adjustment, 0) as points
FROM teams t
LEFT JOIN team_point_adjustments tpa
ON t.id = tpa.team_id
AND (tpa.season_id = 1 OR tpa.season_id IS NULL)
INNER JOIN
division_season_team dst
ON t.id = dst.team_id
LEFT JOIN (
SELECT home_id
team_name,
IF(home_SCORE > away_score, 1,0) win,
IF(home_score = away_score, 1,0) draw,
IF(home_score < away_score, 1,0) loss,
home_score goals_for,
away_score goals_against,
home_score - away_score goal_difference,
1 games_played,
CASE WHEN home_score > away_score THEN 5 WHEN home_score = away_score THEN 2 ELSE 0 END points
FROM matches mat WHERE played = 1 AND season_id = 1 AND division_id = 1
UNION ALL
SELECT away_id,
IF(home_score < away_score, 1, 0),
IF(home_score = away_score, 1,0),
IF(home_score > away_score, 1,0),
away_score,
home_score,
away_score - home_score goal_difference,
1 games_played,
CASE WHEN home_score < away_score THEN 5 WHEN home_score = away_score THEN 2 ELSE 0 END
FROM matches
WHERE played = 1 AND season_id = 1 AND division_id = 1
) AS total ON total.team_name=t.id WHERE dst.season_id = 1 AND dst.division_id = 1
GROUP BY t.id
ORDER BY points DESC, goal_difference DESC"
{
"team_name": "Jets",
"team_id": 20,
"win": "8",
"draw": "0",
"loss": "4",
"goals_for": "354",
"goals_against": "265",
"goal_difference": "89",
"games_played": "12",
"points": 40
}
SELECT
t.name AS team_name,
t.id as team_id,
total.win,
total.draw,
total.loss,
total.goals_for,
total.goals_against,
total.goal_difference,
total.games_played,
total.points + IFNULL(tpa.point_adjustment, 0) as points
FROM teams t
LEFT JOIN (
SELECT team_id, season_id, SUM(point_adjustment) AS point_adjustment
FROM team_point_adjustments
GROUP BY team_id, season_id
) tpa
ON t.id = tpa.team_id AND (tpa.season_id = '" . $season_id . "' OR tpa.season_id IS NULL)
LEFT JOIN division_season_team dst ON t.id = dst.team_id
LEFT JOIN (
SELECT
g.team_id,
g.team_name,
SUM(g.win) AS win,
SUM(g.draw) AS draw,
SUM(g.loss) AS loss,
SUM(g.goals_for) AS goals_for,
SUM(g.goals_against) AS goals_against,
SUM(g.goal_difference) as goal_difference,
SUM(g.g.games_played) AS games_played,
SUM(points) AS points
FROM (
SELECT home_id
team_name,
IF(home_SCORE > away_score, 1,0) win,
IF(home_score = away_score, 1,0) draw,
IF(home_score < away_score, 1,0) loss,
home_score goals_for,
away_score goals_against,
home_score - away_score goal_difference,
1 games_played,
CASE WHEN home_score > away_score THEN '" . $win_value . "' WHEN home_score = away_score THEN '" . $draw_value . "' ELSE '" . $loss_value . "' END points
FROM matches mat WHERE played = 1 AND season_id = '" . $season_id . "' AND division_id = '" . $division_id . "'
UNION ALL
SELECT away_id,
IF(home_score < away_score, 1, 0),
IF(home_score = away_score, 1,0),
IF(home_score > away_score, 1,0),
away_score,
home_score,
away_score - home_score goal_difference,
1 games_played,
CASE WHEN home_score < away_score THEN '" . $win_value . "' WHEN home_score = away_score THEN '" . $draw_value . "' ELSE '" . $loss_value . "' END
FROM matches
WHERE played = 1 AND season_id = '" . $season_id . "' AND division_id = '" . $division_id . "'
) g
GROUP BY g.team_id, f.team_name
) AS total ON total.team_id=t.id
WHERE dst.season_id = '" . $season_id . "' AND dst.division_id = '" . $division_id . "'
ORDER BY points DESC, goal_difference DESC