[英]MySQL - Combine rows into one
I searched through various questions but I didn't find an answer. 我搜索了各种问题,但我找不到答案。 I have a MySQL table 'teams':
我有一个MySQL表'团队':
+--+----+------+
|id|name|active|
+--+----+------+
|1 |bla |1 |
|2 |blu |0 |
|3 |croc|1 |
|4 |bold|1 |
|5 |foo |1 |
|6 |bar |0 |
+--+----+------+
and a table 'data': 和表'数据':
+----+-------+----+
|team|project|time|
+----+-------+----+
|2 |some |1 |
|2 |some2 |5 |
|3 |one |16 |
|3 |one2 |100 |
|5 |more |2 |
|5 |more2 |60 |
+----+-------+----+
In PHP I'm querying the data like this: 在PHP中,我正在查询这样的数据:
SELECT t.name, t.active, d.time
FROM teams t
RIGHT JOIN data d ON (t.id = d.team)
ORDER BY t.id
Everything works find and my result looks like this: 一切正常,我的结果如下:
+----+------+----+
|name|active|time|
+----+------+----+
|blu |0 |1 |
|blu |0 |5 |
|croc|1 |16 |
|croc|1 |100 |
|foo |1 |2 |
|foo |1 |60 |
+----+------+----+
...but I want that my result looks like this: ...但我希望我的结果如下:
+----+------+---+---+
|name|active|t1 |t2 |
+----+------+---+---+
|blu |0 |1 |5 |
|croc|1 |16 |100|
|foo |1 |2 |60 |
+----+------+---+---+
So... How can I reach this? 那么......我怎么能达到这个目的? I hope I have not overlooked an already asked question... :(
我希望我没有忽略一个已经问过的问题...... :(
Thank you very much! 非常感谢你!
EDIT: First, thank you all, but I forgot something... It is also possible that eg one2 does not exist... 编辑:首先,谢谢大家,但我忘了一些......也有可能是例如one2不存在......
try this 尝试这个
SELECT t.name, t.active,
min(time) t1, max(time)t2
FROM teams t
RIGHT JOIN data d ON (t.id = d.team)
group by name
ORDER BY t.id
EDIT: 编辑:
try this 尝试这个
SELECT t.name, t.active,
min(time) t1, if ( max(time) is not null and max(time) <> min(time) , max(time), null )t2
FROM teams t
RIGHT JOIN data d ON (t.id = d.team)
group by name
ORDER BY t.id
If there cold be at maximum two rows for each team, I would use something like this: 如果每个团队最多有两行冷,我会使用这样的东西:
SELECT
teams.name,
teams.active,
min(d1.time) t1,
max(d2.time) t2
FROM
teams INNER JOIN data d1
ON teams.id=d1.team
LEFT JOIN data d2
ON teams.id=d2.team AND d1.time<d2.time
GROUP BY
teams.name,
teams.active
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