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In MySQL, is there a way to turn column records into a list?
Yes, we can turn a column records into a list using the MySQL GROUP_CONCAT(). Let us first create a table −
mysql> create table DemoTable -> ( -> ClientId int, -> ClientName varchar(20) -> ); Query OK, 0 rows affected (0.88 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(100,'Chris'); Query OK, 1 row affected (0.54 sec) mysql> insert into DemoTable values(100,'Robert'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(100,'Adam'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(100,'David'); Query OK, 1 row affected (0.13 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+----------+------------+ | ClientId | ClientName | +----------+------------+ | 100 | Chris | | 100 | Robert | | 100 | Adam | | 100 | David | +----------+------------+ 4 rows in set (0.00 sec)
Here is the query to turn column records into a list −
mysql> select ClientId,group_concat(ClientName separator ',') from DemoTable group by ClientId;
This will produce the following output −
+----------+----------------------------------------+ | ClientId | group_concat(ClientName separator ',') | +----------+----------------------------------------+ | 100 | Chris,Robert,Adam,David | +----------+----------------------------------------+ 1 row in set (0.00 sec)
Updated on: 13-Dec-2019
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