Return a list from different rows into a single field with MySQL
For this, use GROUP_CONCAT(). Let us first create a table −
mysql> create table DemoTable2024
-> (
-> SubjectName varchar(20),
-> StudentName varchar(20)
-> );
Query OK, 0 rows affected (0.62 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable2024 values('MySQL','Chris');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable2024 values('MySQL','David');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable2024 values('MongoDB','Bob');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable2024 values('Java','Sam');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable2024 values('MongoDB','Mike');
Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −
mysql> select *from DemoTable2024;
This will produce the following output −
+-------------+-------------+
| SubjectName | StudentName |
+-------------+-------------+
| MySQL | Chris |
| MySQL | David |
| MongoDB | Bob |
| Java | Sam |
| MongoDB | Mike |
+-------------+-------------+
5 rows in set (0.00 sec)
Following is the query to return a list from different rows into a single field −
mysql> select SubjectName,group_concat(StudentName)
-> from DemoTable2024
-> group by SubjectName;
This will produce the following output −
+-------------+---------------------------+
| SubjectName | group_concat(StudentName) |
+-------------+---------------------------+
| Java | Sam |
| MongoDB | Bob,Mike |
| MySQL | Chris,David |
+-------------+---------------------------+
3 rows in set (0.06 sec)
Published on 06-Apr-2020 16:58:03
