EDUCBA

EDUCBA

MENUMENU
  • Free Tutorials
  • Free Courses
  • Certification Courses
  • 360+ Courses All in One Bundle
  • Login

MariaDB GROUP_CONCAT

By Sohel SayyadSohel Sayyad

Home » Data Science » Data Science Tutorials » Database Management Tutorial » MariaDB GROUP_CONCAT

MariaDB GROUP_CONCAT

Definition of MariaDB GROUP_CONCAT Function

MariaDB provides Group_Concat function to the users. The Group_Concat function is used to return non-null concatenated values from the group. When the result is Null means it returns null which means there are no non-null values. Normally the Group_Concat function is used to return a group of strings into a single string. The maximum returned length of a string in Group_Concat function is 1M or 1K and we can determine by using group_concat_max_len server system variables.

If group_concat_max_len is less than 512 then return type is VARCHAR or VARBINARY otherwise return types is BLOB or TEXT. The choice of return string (binary or non-binary) depends on the input.

Start Your Free Data Science Course

Hadoop, Data Science, Statistics & others

Syntax:

select colm 1, colm 2,……colm N group_concat([distinct value] exp 1, exp 2……..[order by clause sort_exp[Asc | Desc],……] [separator] );

Explanation:

In the above syntax, we used group_concat function with different parameters; here distinct keyword is used to remove duplicate string before the concatenating operation. After that, we use order by clause to sort all values in ascending or descending order before the concatenation operation and last parameter we used a separator. It is used to separate two different resulting strings, the by default separator is comma (,).

How GROUP_CONCAT function works in MariaDB?

Let’s see how the group_concat function works, the group_concat function uses different parameters as follows. Basically, group_concat function concatenates data from multiple rows into a single field.

Distinct clause is used to remove duplicate values or strings in the group before concatenation operation. The other parameter we used with the group_concat function is that order by clause and it is used to make data in some order such as ascending or descending order this sort option we can use as per user requirement. Next parameter is the separator; this separator is used to separate two different strings or values by using commas.

Popular Course in this category
Sale
SQL Training Program (7 Courses, 8+ Projects)7 Online Courses | 8 Hands-on Projects | 73+ Hours | Verifiable Certificate of Completion | Lifetime Access
4.5 (8,900 ratings)
Course Price

View Course

Related Courses
PL SQL Training (4 Courses, 2+ Projects)Oracle Training (14 Courses, 8+ Projects)

Another important thing is that the group_concat function ignores the null string and sometimes it returns a null result if there is no matching row or we can say all arguments are null.

Examples

Let’s see a different example of group_concat function for better understanding as follows. For implementation purposes, we required different tables so first create tables by using the following statement.

create table lang(lang_id int auto_increment,
lang varchar(250) not null,
primary key (lang_id));

Explanation

In the above example, we created a table name as lang with two attributes such as lang_id and lang with different data types as shown in the above statement, and here primary is lang_id, it also has an auto_increment property.

Now create a second table by using the following statement as follows.

create table state_lang(state_id int auto_increment,
lang_id int not null,
state_name varchar(250) not null,
primary key (state_id));

Explanation

In the above example, we created a table name as state_lang with different attributes such as state_id and state_name with different data types and here primary key state_id as shown in the above statement.

Now perform insert operation on created tables by using the following statement.

Insert into lang(lang) values ("Marathi"), ("English"), ("Hindi"), ("Tamil"), ("French");
select * from lang;

Explanation

With the help of the above statement, we insert some records into the lang table. The final output of the above query we illustrate by using the following snapshot.

MariaDB GROUP_CONCAT 1

Similarly, we will insert some records into the state_lang table by using insert into the statement as follows.

insert into state_lang(lang_id, state_name) values (1,"Maharashtra"), (2, "Gujarat"), (3, "Kolkatta"), (4, "Keral");
select * from state_lang;

Explanation

With the help of the above statement, we insert some records into the state_lang table. The final output of the above query we illustrate by using the following snapshot.

MariaDB GROUP_CONCAT 2

Now see how the group_concat function works as follows.

select
state_lang.state_name,
group_concat(lang) lang
from
state_lang
inner join lang
using (lang_id)
group by
state_name;

Explanation

In the above example, we used select and group by clause. See here we used inner join to see the result from two different tables such as lang and state_lang and we merge the result by using group_concat function as shown above statement, that means we can make grouping from different tables as per our requirement. In this example, we don’t have matching records. The final output of the above query we illustrate by using the following snapshot.

MariaDB GROUP_CONCAT 3

Let’s see another simple example of group_concat function using distinct and separator keywords as follows.

create table demoo (name varchar(250) not null);

Now insert some records by using the following statement as follows.

insert into demoo(name) values ("AA"), ("BB"), ("CC"), ("BB");
select * from demoo;

The final output of the above query we illustrate by using the following snapshot.

output

Now use the group_concat function with distinct keywords as follows.

select group_concat(distinct name order by name asc) from demoo;

Explanation

In the above example, we select a clause with group_concat function, here we use a distinct keyword with order by clause to get unique and sorted records from the demo table as shown in the above statement. The final output of the above query we illustrate by using the following snapshot.

output 1

Example

SELECT GROUP_CONCAT(DISTINCT User ORDER BY User asc)
FROM mysql.user;

Explanation

Suppose the user needs to see all distinct users from mysql.user table at that time we can use the above statement. In the above example we use select clause with group_concat function as shown in the statement after that we use order by clause to sort them. In this example, we don’t need to use a separator because MariaDB takes it by default to separate two different strings. The final output of the above query we illustrate by using the following snapshot.

output 2

In some versions of MariaDB we can’t use LIMIT clause with group_concat function this is the restriction or we can say this is the limitation of MariaDB version (10.3.3).

Similarly, we can implement a group_concat function with different clauses with different constraints.

Conclusion

We hope from this article you have understood the MariaDB group_concat function. From the above article, we have learned the basic syntax of the MariaDB group_concat function and we also see different examples of group_concat functions with different clauses and keywords. From this article, we learned how and when we use MariaDB group_concat function.

Recommended Articles

This is a guide to MariaDB GROUP_CONCAT. Here we discuss the definition, How GROUP_CONCAT function works? and examples with code implementation. You may also have a look at the following articles to learn more –

  1. MariaDB MaxScale
  2. MariaDB AUTO_INCREMENT
  3. MariaDB Foreign Key
  4. MariaDB Commands

All in One Data Science Bundle (360+ Courses, 50+ projects)

360+ Online Courses

50+ projects

1500+ Hours

Verifiable Certificates

Lifetime Access

Learn More

0 Shares
Share
Tweet
Share
Primary Sidebar
Database Management Tutorial
  • MariaDB
    • MariaDB Versions
    • MariaDB?list users
    • MariaDB Commands
    • MariaDB odbc
    • MariaDB Workbench
    • MariaDB for windows
    • MariaDB Server
    • MariaDB? Data Types
    • MariaDB?boolean
    • MariaDB phpMyAdmin
    • MariaDB Mysqldump
    • MariaDB Java Connector
    • MariaDB insert
    • MariaDB UPDATE
    • MariaDB? rename column
    • MariaDB AUTO_INCREMENT
    • MariaDB Timezone
    • MariaDB GROUP_CONCAT
    • MariaDB wait_timeout
    • MariaDB MaxScale
    • MariaDB? with
    • MariaDB? create?table
    • MariaDB? SHOW TABLES
    • MariaDB alter table
    • MariaDB List Tables
    • MariaDB JSON Functions
    • MariaDB Foreign Key
    • MariaDB? trigger
    • MariaDB Grant All Privileges
    • MariaDB Select Database
    • MariaDB? create database
    • MariaDB Delete Database
    • MariaDB List Databases
    • MariaDB Functions
    • MariaDB? TIMESTAMP
    • MariaDB create user
    • MariaDB add user
    • MariaDB show users
    • MariaDB Delete User
    • MariaDB? change user password
    • MariaDB? change root password
    • MariaDB reset root password
    • MariaDB IF
    • MariaDB bind-address
    • MariaDB Transaction
    • MariaDB Cluster
    • MariaDB Logs
    • MariaDB Encryption
    • MariaDB? backup
    • MariaDB Replication
    • MariaDB max_allowed_packet
    • MariaDB? performance tuning
    • MariaDB export database
    • MariaDB? import SQL
  • DataBase Management
    • Text Data Mining
    • Roles of Database Management System in Industry
    • SQL Server Database Management Tools
    • Database administrator skills
    • Database Management Systems Advantages
    • Database Testing Interview Questions
    • Data Administrator
    • Database Administrator
    • Database Management Software
    • DataStage
    • Types of Database Models
    • Types of Database
    • Hierarchical Database Model
    • Relational Database
    • Relational Database Advantages
    • Operational Database
    • What is RDBMS?
    • What is DB2?
    • Data Masking Tools
    • Database Security
    • Data Replication
    • Bitmap Indexing
    • Second Normal Form
    • Third Normal Form
    • Fourth Normal Form
    • Data Definition Language
    • Data Manipulation Language
    • Data Control Language
    • Transaction Control Language
    • Conceptual Data Model
    • Entity-Relationship Model
    • Relational Database Model
    • Sequential File Organization
    • Checkpoint in DBMS
    • Teradata Create Table
    • Centralized Database
    • Data Storage in Database
    • Thomas write Rule
    • DBA Interview Questions
    • What is JDBC?
    • jdbc hive
    • Apriori Algorithm
    • JDBC Architecture
    • JDBC Interview Questions
    • Wildcard Characters
    • Distributed Database System
    • Multidimensional Database
  • PL/SQL
    • What is PL/SQL?
    • Careers in PL/SQL
    • PLSQL procedure
    • PL/SQL Exception
    • PL/SQL LIKE
    • PL/SQL Raise Exception
    • PLSQL rowtype
    • PLSQL? bind variables
    • PL/SQL Record
    • PL/SQL WITH
    • PL/SQL bulk collect
    • PL/SQL Block Structure
    • PL/SQL else if
    • PL/SQL nvl2
    • PL/SQL Package
    • PL/SQL exists
    • PL/SQL instr
    • PL/SQL listagg
    • PL/ SQL Formatter
    • PLSQLlength
    • PL/SQL Commands
    • PL/SQL Data Types
    • CASE statement in PL/SQL
    • PL/SQL IF Statement
    • Loops in PL/SQL
    • PL/SQL Add Column
    • For Loop in PLSQL
    • PL/SQL Cursor Loop
    • PLSQL Array
    • Cursors in PL/SQL
    • PL/SQL FOR Loop Cursor
    • PL/SQL Queries
    • PL/SQL SELECT INTO
    • PL/SQL TO_CHAR
    • PL/SQL UNION
    • PL/SQL NOT EQUAL
    • PL/SQL varray
    • PL/SQL Concatenate
    • PL/SQL UPDATE
    • PL/SQL TRIM
    • PL/SQL GROUP BY
    • PL/SQL GOTO
    • PL/SQL Date Functions
    • PL/ SQL having
    • PL/SQL to_DATE
    • PL/SQL NVL
    • PLSQL format date
    • PLSQL mod
    • PLSQL round
    • PL/SQL Boolean
    • PL/SQL exit
    • PL/SQL DECODE
    • PL/SQL ROWNUM
    • PLSQL?pivot
    • PLSQL string functions
    • PL/SQL Block
    • PL/SQL Function
    • PL/SQL Unwrapper
    • PL/SQL Table
    • PL/SQL ALTER TABLE
    • PLSQL execute immediate
    • Triggers in PL/SQL
    • PL/SQL Collections
    • PL/SQL stored procedure
    • PL/SQL Anonymous Block
    • PLSQL Interview Questions
  • TSQL Basic
    • TSQL
    • What is T-SQL
    • T-SQL Commands
    • T-SQL String Functions
    • TSQL Interview Questions
  • SQLite
    • What is SQLite
    • SQLite Commands
    • SQLite Data Types
    • SQLite COUNT
    • SQLite Boolean
    • SQLite autoincrement
    • SQLite select
    • SQLite? Bulk Insert
    • SQLite? add column
    • SQLite? concat
    • SQLite BETWEEN
    • SQLite group by
    • SQLite CASE
    • SQLite group_concat
    • SQLite array
    • SQLite? enum
    • SQLite sum
    • SQLite create table
    • SQLite Alter Table
    • SQLite Create Database
    • SQLite Delete
    • SQLite connection string
    • SQLite Database
    • SQLite Describe Table
    • SQLite Show Tables
    • SQLite exit
    • SQLite create index
    • SQLite foreign key
    • SQLite Stored Procedures
    • SQLite Extension
  • DB2
    • DB2? current date
    • DB2 purescale
    • DB2 backup
    • DB2 restore
    • DB2 C Express
    • DB2 Version
    • DB2? Architecture
    • DB2? Data Types
    • DB2? load
    • DB2? order by
    • DB2 date
    • DB2 NVL
    • DB2? update
    • DB2 warehouse
    • DB2 grant
    • DB2 database
    • DB2 VARCHAR
    • DB2? INSERT
    • DB2 LISTAGG
    • DB2 LIKE
    • DB2 TRUNCATE TABLE
    • DB2 LIST TABLES
    • DB2 between
    • DB2? current timestamp
    • DB2? length
    • DB2? bind
    • DB2 limit rows
    • DB2? export
    • DB2 with
    • DB2 Create Table
    • DB2 case statement
    • DB2 CAST
    • DB2 Functions
    • DB2 Date Functions
    • DB2? row_number
    • DB2 trim
    • DB2? Translate
    • DB2 UNION
    • DB2 timestamp
    • DB2? TIMESTAMPDIFF
    • DB2? replace
    • DB2 merge
    • DB2 COALESCE
    • DB2 ISNULL
    • DB2? explain
    • DB2 Join
    • DB2 alter column
    • DB2 rename column
    • DB2? Describe Table
    • DB2? rename table
    • DB2 List Databases
    • DB2 LUW
    • DB2 Query
    • DB2 GROUP BY
    • DB2 TO_DATE
    • View Serializability in DBMS
    • MariaDB Join
    • MariaDB JSON
    • MariaDB? show databases
    • Dataset Normalization
    • MariaDB Max Connections
    • jdbc connection
    • MariaDB GUI
  • DBMS
    • Introduction To DBMS
    • DBMS ER Diagram
    • What is DBMS?
    • DBMS join
    • DBMS Functions
    • Data Administrator in DBMS
    • DBMS Canonical Cover
    • DBMS Log-Based Recovery
    • DBMS Multivalued Dependency
    • Netezza Database
    • DBMS Concepts
    • DBMS Constraints
    • DBMS_Scheduler
    • B+ Tree in DBMS
    • DBMS_LOB
    • dbms entity
    • DBMS Foreign Key
    • DBMS Users
    • DBMS_Metadata.get_ddl
    • Relational Algebra in DBMS
    • DBMS Components
    • DBMS Features
    • DBMS Models
    • DBMS Relational Model
    • Hashing in DBMS
    • DBMS network model
    • Relationship in DBMS
    • ER Model in DBMS
    • Data Models in DBMS
    • Static Hashing in DBMS
    • Advantages of DBMS
    • dbms_output.put_line
    • DBMS Data Dictionary
    • dbms_xplan.display_cursor
    • Normal Forms in DBMS
    • DBMS helps achieve
    • DBMS 3 tier Architecture
    • Relational Calculus in DBMS
    • Serializability in DBMS
    • File Organization in DBMS
    • DBMS Transaction Processing
    • States of Transaction in DBMS
    • Functional Dependency in DBMS
    • Generalization in DBMS
    • Data Independence in DBMS
    • Lock Based Protocols in DBMS
    • Deadlock in DBMS
    • Integrity Constraints in DBMS
    • Concurrency Control in DBMS
    • Validation Based Protocol in DBMS
    • DBMS Locks
    • Normalization in DBMS
    • Transaction Property in DBMS
    • Specialization in DBMS
    • Aggregation in DBMS
    • Types of DBMS

Related Courses

SQL Certification Course

PL/SQL Certification Course

Oracle Certification Course

Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Live Classes
  • Corporate Training
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Database Management
  • Machine Learning
  • All Tutorials
Certification Courses
  • All Courses
  • Data Science Course - All in One Bundle
  • Machine Learning Course
  • Hadoop Certification Training
  • Cloud Computing Training Course
  • R Programming Course
  • AWS Training Course
  • SAS Training Course

© 2022 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

EDUCBA
Free Data Science Course

Hadoop, Data Science, Statistics & others

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA
Free Data Science Course

Hadoop, Data Science, Statistics & others

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

Let’s Get Started

By signing up, you agree to our Terms of Use and Privacy Policy.

Loading . . .
Quiz
Question:

Answer:

Quiz Result
Total QuestionsCorrect AnswersWrong AnswersPercentage

Explore 1000+ varieties of Mock tests View more

EDUCBA Login

Forgot Password?

By signing up, you agree to our Terms of Use and Privacy Policy.

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

Special Offer - SQL Certification Course Learn More