group-concat

I have two tables: Names(id, name) Addresses(id, name_id, address) I want to write query that return me: name, address list (address1, address2, adress3, ..) Something like: Select A.name, B.list_of_addresses From Names A Inner Join (Select name_id, /*list_of_addresses with comma between them*/ From Addresses Group By name_id) B ON A.id=B.name_id You can use For XML as a trick to achieve that from SQL Server 2005 onwards. Select A.name, stuff(( select ',' + B.address from Addresses B WHERE A.id=B.name_id for xml path('')),1,1,'') From Names A It works well if you don't already have commas in

I used java to query some records from Mysql. But in some querys of one duration, i meet a problem which make query failed, but in others , it query successful. The error message is next: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 90 milliseconds ago. The last packet sent successfully to the server was 1,674 milliseconds ago. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at

I have a table of "Songs", "Songs_Tags" (relating songs with tags) and "Songs_Votes" (relating songs with boolean like/dislike). I need to retrieve the songs with a GROUP_CONCAT() of its tags and also the number of likes (true) and dislikes (false). My query is something like that: SELECT s.*, GROUP_CONCAT(st.id_tag) AS tags_ids, COUNT(CASE WHEN v.vote=1 THEN 1 ELSE NULL END) as votesUp, COUNT(CASE WHEN v.vote=0 THEN 1 ELSE NULL END) as votesDown, FROM Songs s LEFT JOIN Songs_Tags st ON (s.id = st.id_song) LEFT JOIN Votes v ON (s.id=v.id_song) GROUP BY s.id ORDER BY id DESC The problem is that

I have a query like this: SELECT product.id, GROUP_CONCAT(image.id) AS images_id, GROUP_CONCAT(image.title) AS images_title, GROUP_CONCAT(facet.id) AS facets_id ... GROUP BY product.id And the query works, but not as expected, because if I have a product with 5 facets and 1 image (suppose an image with id=7), then I get something like this in "images_id": "7,7,7,7,7" If I have 2 images (7 and 3) then I get something like: "7,7,7,7,7,3,3,3,3,3" and in facets I get something like: "8,7,6,5,4,8,7,6,5,4" I think MySQL is making some type of union of the differents rows returned by the query, and

I have three tables: users: sports: user_sports: id | name id | name id_user | id_sport | pref ---+-------- ---+------------ --------+----------+------ 1 | Peter 1 | Tennis 1 | 1 | 0 2 | Alice 2 | Football 1 | 2 | 1 3 | Bob 3 | Basketball 2 | 3 | 0 3 | 1 | 2 3 | 3 | 1 3 | 2 | 0 The table user_sports links users and sports with an order of preference ( pref ). I need to make a query that returns this: id | name | sport_ids | sport_names ---+-------+-----------+---------------------------- 1 | Peter | 1,2 | Tennis,Football 2 | Alice | 3 | Basketball 3 | Bob | 2,3,1 | Football,Basketball,Tennis I

I have three tables: table "package" ----------------------------------------------------- package_id int(10) primary key, auto-increment package_name varchar(255) price decimal(10,2) table "zones" ------------------------------------------------------ zone_id varchar(32) primary key (ex of data: A1, Z2, E3, etc) table "package_zones" ------------------------------------------------------ package_id int(10) zone_id varchar(32) What I'm trying to do is return all the information in package table PLUS a list of zones for that package. I want the list of zones sorted alphabetically and comma

I am working on an open source project called PHP-Bouncer , and I'm having issues with a MySQL Query I am writing for it. Basically we have three tables: BouncerRoles, PageInRole, and BouncerPageOverrides. BouncerRoles contains access levels, and the other two tables link back to BouncerRoles via Foreign Key and provide multiple entries of additional data. I have written the following query to attempt to pull all of the role data I need all at once: select BouncerRoles.RoleID, BouncerRoles.RoleName, GROUP_CONCAT(PageInRole.PageName separator '|') as ProvidedPages, GROUP_CONCAT(CONCAT

(NOTE: This question is not about escaping queries, it's about escaping results) I'm using GROUP_CONCAT to combine multiple rows into a comma delimited list. For example, assume I have the two (example) tables: CREATE TABLE IF NOT EXISTS `Comment` ( `id` int(11) unsigned NOT NULL auto_increment, `post_id` int(11) unsigned NOT NULL, `name` varchar(255) collate utf8_unicode_ci NOT NULL, `comment` varchar(255) collate utf8_unicode_ci NOT NULL, PRIMARY KEY (`id`), KEY `post_id` (`post_id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=6 ; INSERT INTO `Comment` (`id`,