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Get the sum only from specific cells in MySQL?
For only specific cells, set a condition with WHERE and use aggregate function SUM() to add. Let us first create a table −
mysql> create table DemoTable1370 -> ( -> StudentName varchar(20), -> Marks int -> ); Query OK, 0 rows affected (0.87 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1370 values('Adam Smith',56);
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable1370 values('Chris Brown',67);
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable1370 values('Adam Smith',69);
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable1370 values('David Miller',98);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable1370 values('John Smith',59);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1370 values('Adam Smith',79);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable1370 values('Chris Brown',77);
Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1370;
This will produce the following output −
+--------------+-------+ | StudentName | Marks | +--------------+-------+ | Adam Smith | 56 | | Chris Brown | 67 | | Adam Smith | 69 | | David Miller | 98 | | John Smith | 59 | | Adam Smith | 79 | | Chris Brown | 77 | +--------------+-------+ 7 rows in set (0.00 sec)
Here is the query that gets the sum from specific cells −
mysql> select sum(Marks) AS Total from DemoTable1370 where StudentName='Adam Smith';
This will produce the following output −
+-------+ | Total | +-------+ | 204 | +-------+ 1 row in set (0.00 sec)
Updated on: 11-Nov-2019
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