GROUP_CONCAT ORDER BY

Question

he a table como:

+-----------+-------+------------+ 
| 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 | 

me trataron 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 | 
+-----------+-------------------+-----------------------------+ 

Pero quiero conseguir los puntos de vista en orden, como:

+-----------+-------------------+----------------------------+ 
| client_id | views    | percentage     | 
+-----------+-------------------+----------------------------+ 
|   1 | 1,2,3,4,5,6,7,8,9 | 52,67,33,55,66,20,80,34,56 | 
+-----------+-------------------+----------------------------+ 

Answer 1

Puede utilizar ORDER BY dentro de la función GROUP_CONCAT de esta manera:

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 

Answer 2

El group_concat admite su propio orden por la cláusula

http://mahmudahsan.wordpress.com/2008/08/27/mysql-the-group_concat-function/

Por lo que debe ser capaz de escribir:

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 

Answer 3

Trate

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

Answer 4

En IMPALA, no tener orden en GROUP_CONCAT puede ser problemático en Coders'Co. tenemos algún tipo de solución para eso (lo necesitamos para Rax/Impala). Si necesita el resultado GROUP_CONCAT con una cláusula ORDER BY en IMPALA, eche un vistazo a esta publicación del blog: http://raxdb.com/blog/sorting-by-regex/