MySQL GROUP_CONCAT ORDER BY
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GROUP_CONCAT ORDER BY
提问by ronquiq
I've a tablelike:
我有一张像：
+-----------+-------+------------+
| client_id | views | percentage |
+-----------+-------+------------+
| 1 | 6 | 20 |
| 1 | 4 | 55 |
| 1 | 9 | 56 |
| 1 | 2 | 67 |
| 1 | 7 | 80 |
| 1 | 5 | 66 |
| 1 | 3 | 33 |
| 1 | 8 | 34 |
| 1 | 1 | 52 |
I tried group_concat:
我试过group_concat：
SELECT li.client_id, group_concat(li.views) AS views,
group_concat(li.percentage) FROM li GROUP BY client_id;
+-----------+-------------------+-----------------------------+
| client_id | views | group_concat(li.percentage) |
+-----------+-------------------+-----------------------------+
| 1 | 6,4,9,2,7,5,3,8,1 | 20,55,56,67,80,66,33,34,52 |
+-----------+-------------------+-----------------------------+
But I want to get the views in order, like:
但我想按顺序获得视图，例如：
+-----------+-------------------+----------------------------+
| client_id | views | percentage |
+-----------+-------------------+----------------------------+
| 1 | 1,2,3,4,5,6,7,8,9 | 52,67,33,55,66,20,80,34,56 |
+-----------+-------------------+----------------------------+
回答by aleroot
You can use ORDER BYinside the GROUP_CONCATfunction in this way:
您可以通过这种方式ORDER BY在GROUP_CONCAT函数内部使用：
SELECT li.client_id, group_concat(li.percentage ORDER BY li.views ASC) AS views,
group_concat(li.percentage ORDER BY li.percentage ASC)
FROM li GROUP BY client_id
回答by TetonSig
The group_concat supports its own order by clause
group_concat 支持自己的 order by 子句
http://mahmudahsan.wordpress.com/2008/08/27/mysql-the-group_concat-function/
http://mahmudahsan.wordpress.com/2008/08/27/mysql-the-group_concat-function/
So you should be able to write:
所以你应该能够写：
SELECT li.clientid, group_concat(li.views order by views) AS views,
group_concat(li.percentage order by percentage)
FROM table_views GROUP BY client_id
回答by Virendra
Try
尝试
SELECT li.clientid, group_concat(li.views ORDER BY li.views) AS views,
group_concat(li.percentage ORDER BY li.percentage)
FROM table_views li
GROUP BY client_id
http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html#function%5Fgroup-concat
http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html#function%5Fgroup-concat
回答by JMS
In IMPALA, not having order in the GROUP_CONCAT can be problematic, over at Coders'Co. we have some sort of a workaround for that (we need it for Rax/Impala). If you need the GROUP_CONCAT result with an ORDER BY clause in IMPALA, take a look at this blog post: http://raxdb.com/blog/sorting-by-regex/
在 IMPALA 中，在 GROUP_CONCAT 中没有顺序可能会出现问题，在 Coders'Co。我们有一些解决方法（我们需要它用于 Rax/Impala）。如果您需要 IMPALA 中带有 ORDER BY 子句的 GROUP_CONCAT 结果，请查看此博客文章：http: //raxdb.com/blog/sorting-by-regex/
