MySQL query to fetch the maximum corresponding value from duplicate column values

Let us first create a table −

mysql> create table DemoTable(    ProductName varchar(100),    ProductPrice int ); Query OK, 0 rows affected (0.68 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('Product-1',56); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Product-2',78); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values('Product-1',88); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Product-2',86); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('Product-1',45); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Product-3',90); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Product-2',102); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('Product-3',59); 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 −

+-------------+--------------+ | ProductName | ProductPrice | +-------------+--------------+ | Product-1 | 56 | | Product-2 | 78 | | Product-1 | 88 | | Product-2 | 86 | | Product-1 | 45 | | Product-3 | 90 | | Product-2 | 102 | | Product-3 | 59 | +-------------+--------------+ 8 rows in set (0.00 sec)

Following is the query to fetch the maximum corresponding value from duplicate column values. Here, we are finding the maximum ProductPrice for a duplicate column like Product-1, Product-2, etc −

mysql> select ProductName,MAX(ProductPrice) from DemoTable group by ProductName;

This will produce the following output −

+-------------+-------------------+ | ProductName | MAX(ProductPrice) | +-------------+-------------------+ | Product-1 | 88 | | Product-2 | 102 | | Product-3 | 90 | +-------------+-------------------+ 3 rows in set (0.00 sec)