Database Administrators Stack Exchange
Database Administrators Stack Exchange

Questions tagged [group-concatenation]

59 questions
12
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2 answers

Why set `group_concat_max_len` below the maximum?

MySQL 5.5.28 on Ubuntu 12.04 If the result is longer than group_concat_max_len then the result is gracelessly truncated. Currently I have a script that tries to check the required length ahead of time and sets group_concat_max_len to be large…
Buttle Butkus
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8
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3 answers

group_concat and group by together

I am trying to write a query using group_concat, concat and other functions, but I am getting stuck not able to join and group the data to represent them in 1 cell. Here's how my data is... table1 +-----+---------+ | id | ... …
Kumar
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7
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1 answer

Concatenate one-to-many field in single result?

Say I have the following query: SELECT * FROM AppDetails, AppTags WHERE AppDetails.AppID = '1' AND AppDetails.AppID = AppTags.AppID Which gives the following results: AppID AppName AppType Tag 1 Application1 Utility …
THE JOATMON
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6
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1 answer

Multiple "GROUP_CONCAT"s with WHERE clause

In a table as id name type info 1 BMW car yes 2 Reno car no 3 IBM electronics no 4 Sony electronics yes 5 Mazda car yes I use GROUP_CONCAT to get…
Googlebot
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5
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3 answers

Concatenating rows into a single string query running for 5 hrs and counting

I have a table with 2.6m records. It looks like this: email prject_name rafael.nadal@xyz.com lab1 rafael.nadal@xyz.com lab2 rafael.nadal@xyz.com lab3 TEST@TEST.COM …
user97340
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4
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1 answer

MySQL - GROUP_CONCAT returns duplicate data, can't use DISTINCT

I have a normalized database and I'm trying to return data from multiple tables using JOINs and GROUP_CONCAT. Problem: Rows are being duplicated with GROUP_CONCAT. I can't use DISTINCT because some of the data (ingredient mfr) does need to be…
Matt Shultz
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4
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2 answers

Query monthly having group_concat and group by need help

I’m stuck on a join tables query presenting data monthly involving GROUP BY and GROUP_CONCAT. Here’s a simple client table (DDL and DML at the bottom of this post): id | Name 1 | Sony 2 | Toshiba 3 | Apple 4 | LG 5 | Uco Then the event…
Appschema
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4
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1 answer

Add a JOIN to GROUP_CONCAT()

I have a table of mostly-static objectives and another to track users' completions of those objectives. They can associate the completion with one or more records entered in another table and/or a text note. I'd like to format all of this together…
Cameron Sumpter
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4
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1 answer

When does a MySQL session end?

I have a stored procedure as described below. DROP PROCEDURE `GetVoteID`// CREATE DEFINER=`u1037413_manager`@`%` PROCEDURE `GetVoteID`(IN minimum_votes INT(11), IN current_round INT(11), INOUT votes_id TEXT) BEGIN SET SESSION…
Kristofer Gisslén
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3
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1 answer

Selecting multiple columns from multiple rows in one column (subquery?)

I'm working with MySQL 5.1.68. I have a situation where I'd like to select rows from another table into a column. I'd like to output this: id # name # citizen_name (multiple citizen names) 1 # The Hague # Barack Obama, Marc Zuckerberg, George…
ivodvb
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3
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2 answers

Getting repeated value in a group_concat only if ids are different

I have two tables, first the table Product: id|category_id --+----------- 1 | 12345 2 | 12345 3 | 12465 And then a table activity: id|prod_id|activity_type |description --+-------+----------------+----------- 1 | 1 | Initialization | blah 2 |…
Eldros
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3
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4 answers

How to use GROUP BY in a way concatenates data in one column, but filters for specific data in another

I am running SQL Server 2014 I have a table that looks like this: ID | Name | AddressType | Address | Features ======================================================== 1 | Bob | Home | 123 Nope St | JP 2 | John | Work …
Nosajimiki
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3
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1 answer

Getting the query right?

CREATE TABLE `Action` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `created_By_Id` int(10) unsigned NOT NULL, `name` varchar(60) NOT NULL, `created_At` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, `notes` varchar(400) DEFAULT NULL, …
j10
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3
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2 answers

COUNT(), GROUP BY and GROUP_CONCAT() together on MySQL

My question is quite simple. I just want to count events from each client and present them in a comma separated single row. I have this table: +----+----------------+ | id | event | +----+----------------+ | 22 | a | | 23 | bb …
LucasBr
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3
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2 answers

MySQL GROUP_CONCAT Query, is there a better way?

I have the below Data / Query. Is this really the most efficient way of doing this? As it seems like a lot of work to get the result. I've tried reducing it / combining the parts but this is the only way I can get it to work. (n.b. The actual table…
IGGt
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