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How to concatenate columns based on corresponding duplicate id values in MySQL? Display the duplicate values in the same column separated by slash
For this, you can use GROUP_CONCAT().
Let us first create a table −
mysql> create table DemoTable764 ( ProductId int, ProductPrice int ); Query OK, 0 rows affected (0.56 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable764 values(101,10000); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable764 values(102,1090); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable764 values(103,4000); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable764 values(102,3450); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable764 values(101,20000); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable764 values(104,50000); Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable764;
This will produce the following output -
+-----------+--------------+ | ProductId | ProductPrice | +-----------+--------------+ | 101 | 10000 | | 102 | 1090 | | 103 | 4000 | | 102 | 3450 | | 101 | 20000 | | 104 | 50000 | +-----------+--------------+ 6 rows in set (0.00 sec)
Following is the query to concatenate columns with corresponding duplicate id values −
mysql> select ProductId, group_concat(ProductPrice SEPARATOR '/') AS ProductPrice from DemoTable764 group by ProductId;
This will produce the following output -
+-----------+---------------+ | ProductId | ProductPrice | +-----------+---------------+ | 101 | 10000/20000 | | 102 | 1090/3450 | | 103 | 4000 | | 104 | 50000 | +-----------+---------------+ 4 rows in set (0.00 sec)
Updated on: 03-Sep-2019
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