Questions tagged [group-concatenation]

The tag has no usage guidance.

10 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
1answer
5k views

MySQL "Out of sort memory" error on a simple GROUP_CONCAT query

I have a (what it seems to me) simple query which fails to run on a simple table, the error is: Out of sort memory, consider increasing server sort buffer size These are the SQL statements which I'...
2
votes
0answers
434 views

Retrieve all product from one category (tree model)

I'm using MySQL, have categories in a tree model. One product belongs to only one (leaf) category. What I want to accomplish is, given one category (any, could or not be a leaf or a root), return ...
1
vote
0answers
32 views

MySQL: sum values with join and group concatenation

I've got the following tables: users: mysql [test]> SHOW CREATE TABLE users\G *************************** 1. row *************************** Table: users Create Table: CREATE TABLE `users` ...
1
vote
0answers
255 views

Mysql trigger with group_concat

I'm trying to create insert and update triggers with SELECT GROUP_CONCAT request on one of the fields; This select query perfectly works, when I trying it in console, but trigger saves only first ...
1
vote
0answers
1k views

Duplicate GROUP_CONCAT values

Writing a plugin for Wordpress using a custom post type and an additional alias table to hold repetition of the post events. The problem comes with duplicate post meta values. wp_post_meta table: ...
1
vote
0answers
2k views

How can I join one to one to (many to one) without using group_concat

I have a table structure as follows: -- -- Table structure for table `emails` -- CREATE TABLE IF NOT EXISTS `emails` ( `ID` int(5) NOT NULL AUTO_INCREMENT, `email` varchar(255) COLLATE ...
0
votes
1answer
197 views

What is the best way to handle a join / group_concat query in MySQL

I am looking for some feedback regarding the best way to handle the following (simplified for this example) situation. I have 3 tables: tasks, assignees, and users ---tasks---- id, task, completed ---...
0
votes
1answer
101 views

Dynamic Pivot Table syntax error

What's wrong with this Dynamic Pivot table query? I'm staring myself blind on this. mysql> SET @sql = NULL; Query OK, 0 rows affected (0.00 sec) mysql> SELECT -> GROUP_CONCAT(DISTINCT ...
0
votes
1answer
63 views

MySQL group concatenation - creation of insert statement on temp table

I have a temporary table TEST_GROUP, from where I'm working its data to fill another one. From this table, giving the example in the picture, my expected result is to group these three rows, so I can ...
-2
votes
2answers
1k views

MySQL Join two tables with comma separated values

I've got two tables as below: CARLINE option_value option_name tipologia_auto_1 Citycar tipologia_auto_2 Berlina tipologia_auto_3 SUV Hobby_1 football Hobby_2 Basket Datimarketing (is the ...