MySQL: sortowanie grup wartości CONCAT

Question

MySQL: sortowanie grup wartości CONCAT

W skrócie: czy jest jakiś sposób na sortowanie wartości w instrukcji GROUP_CONCAT?

Zapytanie:

GROUP_CONCAT((SELECT GROUP_CONCAT(parent.name SEPARATOR " &raquo; ") 
FROM test_competence AS node, test_competence AS parent 
WHERE node.lft BETWEEN parent.lft AND parent.rgt 
  AND node.id = l.competence 
  AND parent.id != 1 
ORDER BY parent.lft) SEPARATOR "<br />\n") AS competences

I get this row:

Rzemiosło " Stolarstwo

Administracja " Organizacja

Chcę tak:

Administracja " Organizacja

Rzemiosło " Stolarstwo

155

mysql sorting group-concat sql-order-by

Author: Machavity, 2009-06-15

Source

2 answers

Chcesz zamówić przez?

SELECT _key,            
COUNT(*) as cnt,            
GROUP_CONCAT(_value ORDER BY _value SEPARATOR ', ') as value_list      
FROM group_concat_test      
GROUP BY _key      
ORDER BY _key;

18

Author: Haim Evgi,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2015-01-15 18:12:01

score 330 · Accepted Answer

Zobacz http://dev.mysql.com/doc/refman/...tions.html#function_group-concat :

SELECT student_name,
  GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')
  FROM student
  GROUP BY student_name;

330

Author: Sampson,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2009-06-15 14:09:30