Add records from corresponding duplicate values in another column with MySQL
For this, you can use the aggregate function SUM() along with the GROUP BY clause. Let us first create a table −
mysql> create table DemoTable
-> (
-> Name varchar(20),
-> Value int
-> );
Query OK, 0 rows affected (2.08 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('Chris',50);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('David',90);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values('Chris',60);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable values('Bob',100);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('David',80);
Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −
mysql> select * from DemoTable;
This will produce the following output −
+-------+-------+
| Name | Value |
+-------+-------+
| Chris | 50 |
| David | 90 |
| Chris | 60 |
| Bob | 100 |
| David | 80 |
+-------+-------+
5 rows in set (0.00 sec)
Following is the query to add records from duplicate values in another column −
mysql> select Name,sum(Value) as GrandTotal from DemoTable group by Name;
This will produce the following output −
+-------+------------+
| Name | GrandTotal |
+-------+------------+
| Chris | 110 |
| David | 170 |
| Bob | 100 |
+-------+------------+
3 rows in set (0.03 sec)
Published on 17-Dec-2019 10:28:12
