Select and sum with grouping in MySQL?

To sum, use the aggregate function SUM(). With that, group using MySQL GROUP BY. Let us first create a table −

mysql> create table DemoTable
   -> (
   -> ProductName varchar(20),
   -> ProductQuantity int,
   -> ProductPrice int
   -> );
Query OK, 0 rows affected (0.63 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('Product-1',2,50);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('Product-2',3,80);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable values('Product-2',4,100);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable values('Product-1',4,150);
Query OK, 1 row affected (0.11 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output−

+-------------+-----------------+--------------+
| ProductName | ProductQuantity | ProductPrice |
+-------------+-----------------+--------------+
| Product-1   |               2 |           50 |
| Product-2   |               3 |           80 |
| Product-2   |               4 |          100 |
| Product-1   |               4 |          150 |
+-------------+-----------------+--------------+
4 rows in set (0.00 sec)

Following is the query to select with grouping in MySQL −

mysql> select *,sum(ProductQuantity*ProductPrice) as Total from DemoTable
   -> group by ProductName;

This will produce the following output−

+-------------+-----------------+--------------+-------+
| ProductName | ProductQuantity | ProductPrice | Total |
+-------------+-----------------+--------------+-------+
| Product-1   |               2 |           50 |   700 |
| Product-2   |               3 |           80 |   640 |
+-------------+-----------------+--------------+-------+
2 rows in set (0.00 sec)