How to use GROUP_CONCAT in CONCAT in MySQL?

Firstly, let us create a table.

mysql> create table GroupConcatenateDemo
-> (
-> id int,
-> FirstName varchar(100),
-> Score int
-> );
Query OK, 0 rows affected (0.61 sec)

Inserting records

Let us now insert some records.

mysql> insert into GroupConcatenateDemo values(1,'John',94);
Query OK, 1 row affected (0.16 sec)

mysql> insert into GroupConcatenateDemo values(2,'Bob',98);
Query OK, 1 row affected (0.16 sec)

mysql> insert into GroupConcatenateDemo values(4,'Carol',100);
Query OK, 1 row affected (0.20 sec)

To check how many records are present in the table.

mysql> select *from GroupConcatenateDemo;

Here is the output.

+------+-----------+-------+
| id   | FirstName | Score |
+------+-----------+-------+
| 1    | John      | 94    |
| 2    | Bob       | 98    |
| 3    | Carol     | 100   |
+------+-----------+-------+
3 rows in set (0.00 sec)

Syntax to use GROUP_CONCAT

The following is the syntax to concatenate records.

Select column_name1,group_concat(concat(`Column_name2`,'separatorValue',`Column_name3`) separator 'separatorValue')
as AliasName yourTableName group by column_name1;

The following is an example.

mysql> SELECT
-> id,group_concat(concat(`FirstName`,':',`score`) separator ',')
-> as FirstNameAndScore from GroupConcatenateDemo group by id;

Here is the output that shows we have successfully concatenated records.

+------+-------------------+
| id   | FirstNameAndScore |
+------+-------------------+
| 1    | John:94           |
| 2    | Bob:98            |
| 3    | Carol:100         |
+------+-------------------+
3 rows in set (0.00 sec)