Combining multiple rows into a comma delimited list in MySQL?
To combine multiple rows into a comma delimited list, use the GROUP_CONCAT() method. Let us first create a table −
mysql> create table DemoTable
(
Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
Name varchar(30),
Marks int
);
Query OK, 0 rows affected (0.52 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(Name,Marks) values('John',67);
Query OK, 1 row affected (0.25 sec)
mysql> insert into DemoTable(Name,Marks) values('Carol',69);
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(Name,Marks) values('Sam',69);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(Name,Marks) values('David',78);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable(Name,Marks) values('Chris',69);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(Name,Marks) values('Bob',67);
Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+----+-------+-------+
| Id | Name | Marks |
+----+-------+-------+
| 1 | John | 67 |
| 2 | Carol | 69 |
| 3 | Sam | 69 |
| 4 | David | 78 |
| 5 | Chris | 69 |
| 6 | Bob | 67 |
+----+-------+-------+
6 rows in set (0.00 sec)
Following is the query to combine multiple rows into a comma delimited list in MySQL −
mysql> SELECT Marks, GROUP_CONCAT(Name ORDER BY Name ASC SEPARATOR ', ')
from DemoTable GROUP BY Marks;
Output
+-------+-----------------------------------------------------+
| Marks | GROUP_CONCAT(Name ORDER BY Name ASC SEPARATOR ', ') |
+-------+-----------------------------------------------------+
| 67 | Bob, John |
| 69 | Carol, Chris, Sam |
| 78 | David |
+-------+-----------------------------------------------------+
3 rows in set (0.00 sec)
Published on 13-Jun-2019 12:18:01
