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MySQL query to concatenate all the values in each row based on the common matching ID
Let us first create a table −
mysql> create table DemoTable ( StudentId int, StudentFirstName varchar(100), StudentLastName varchar(100) ); Query OK, 0 rows affected (0.54 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(1000,'Adam','Smith'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(1000,'John','Doe'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(1000,'David','Miller'); Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-----------+------------------+-----------------+ | StudentId | StudentFirstName | StudentLastName | +-----------+------------------+-----------------+ | 1000 | Adam | Smith | | 1000 | John | Doe | | 1000 | David | Miller | +-----------+------------------+-----------------+ 3 rows in set (0.00 sec)
Following is the query to concatenate all the values in each row based on the common matching ID −
mysql> select StudentId,group_concat(StudentFirstName),group_concat(StudentLastName) from DemoTable group by StudentId;
This will produce the following output −
+-----------+--------------------------------+-------------------------------+ | StudentId | group_concat(StudentFirstName) | group_concat(StudentLastName) | +-----------+--------------------------------+-------------------------------+ | 1000 | Adam,John,David | Smith,Doe,Miller | +-----------+--------------------------------+-------------------------------+ 1 row in set (0.00 sec)
Updated on: 27-Sep-2019
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